Skip to content

Compare digital camera sensor sizes: 1″-Type, 4/3, APS-C, full frame 35mm

Since 2016, a 1-inch Type sensor size has optimized the portability of sharp travel cameras (recommended here). In comparison, cameras using larger APS-C sensors require heftier 11x to 19x optical zoom lenses which struggle to sharpen the edges of the frame. With a sensor smaller than APS-C, Micro Four Thirds systems have lagged behind the competition for sharp images from a generous zoom range in a compact package. Cameras using full-frame sensors restrict zoom range or overburden travelers. Sensors smaller than “1-inch” size can support super zoom ranges but worsen image quality, especially in dim light. Smartphones compensate for tiny cameras via computational power and instantly-shareable images, but can fumble in dim light or telephoto reach.

The archaic inch-sizing of camera light sensors is clarified in the illustration and table below, with relative sizes and millimeters. Legacy sizing labels such as 1/2.5″ Type harken back to antiquated 1950s-1980s Vidicon video camera tubes.

For a given year of technological advance, a camera with physically bigger sensor area tends to capture better image quality by gathering more light, but at the cost of larger-diameter, bulkier lenses. Recent digital sensor advances have shrunk cameras and increased optical zoom ranges while preserving image quality. The top smartphone cameras can potentially make good 18-inch prints and share publishable pictures. Clearly, an evocative image can be created with any decent camera in the hands of a skilled or lucky photographer. For my nature-travel publishing, I prefer a midsized camera with 1-inch Type sensor for superior optical zoom range, good performance in dim light, and sharp prints:

Below, compare sensor sizes for digital cameras:

Sensor size comparisons for digital cameras - PhotoSeek.com
This illustration compares digital camera sensor sizes: full frame 35mm (which is actually 36mm wide), APS-C, Micro Four Thirds, 1-inch, 1/1.7″ and 1/2.5” Type. For new digital cameras, a bigger sensor area captures better quality, but requires larger-diameter, bulkier lenses. As of 2018, 1-inch Type sensors optimize the size of a serious travel camera. “Full-frame 35mm” sensor (36 x 24 mm) is a standard for comparison, with a diagonal field-of-view crop factor = 1.0; in comparison, a pocket camera’s 1/2.5” Type sensor crops the light gathering by 6.0x smaller diagonally (with a surface area 35 times smaller than full frame).

Click here for Tom’s latest camera recommendations.

As an Amazon Associate, I earn from qualifying purchases. To support Tom’s work:
Buy any products at Amazon.com 

1″-Type sensor size is now optimal for travel camera portability

I have regularly upgraded my digital cameras every 2 to 5 years because the latest devices keep beating older models. Since 2016, 1″-Type sensors optimize the bulk of serious travel cameras, as in the following which capture excellent dynamic range (bright to dark) with exceptionally fast autofocus.

In 2018, the best & brightest pocketable zoom camera was the Sony Cyber-shot DSC-RX100 VI (at Amazon) (11 oz, 8x zoom 24–200mm f/2.8-4.5) — my favorite backpacking camera. Upgrading to Sony RX100 VII (2019) focuses even faster. Read my RX100M6 review.

  • Cheaper alternative: Panasonic LUMIX ZS100 camera (Amazon) (2016, 11oz, 10x zoom, 25-250mm equivalent, 20MP). The pocketable ZS100 (read my review) is not as sharp as the 3x-zoom Sony RX100 V, IV or III cameras, but captures close macro at more zoom settings and enormously extends optical telephoto reach 70-250mm, which clearly beats digitally cropping those 3x-zoom rivals.

Since the release of Panasonic ZS100 in 2016 and Sony RX100 VI in 2018, publishable image quality can now come from pocketsize cameras having versatile 10x or 8x zooms. Capturing 20 high-quality megapixels, both the Panasonic ZS100 and superior Sony RX100 version VI rival the daylight image quality of all of my camera systems used over 34 years until 2012 — beating my cameras up to 4 times heavier, up to 11x zoom range, up to 12 megapixels, shot at base ISO 100.

Since 2018, Tom’s main camera has been the Sony RX10 IV (price at Amazon) (37 oz, 25x zoom) — the world’s most versatile midsize camera for on-the-go photographers — read my RX10 IV review.

Sony Cyber-shot RX10 IV (RX10M4) with 24-600mm equivalent f/2.4-4 stabilized zoom lens.
Sony Cyber-shot RX10 IV (RX10M4) with 24-600mm equivalent f/2.4-4 stabilized zoom lens. 20MP 1″-type stacked CMOS sensor. Phase detection 315-point autofocus. Touchscreen for AF.

APS-C size sensor

Although I prefer the above portable all-in-one solutions for travel convenience, a top APS-C-sensor camera (such as Sony A6300) lets you interchange lenses and capture less noise in dim light at ISO 3200+ sensitivity.

A bulkier DSLR-style camera with APS-C sensor may attract traditionalists wanting a legacy optical viewfinder, improved night photography, and a bounty of lens choices:

Micro Four Thirds Cameras

Panasonic and OM SYSTEM (formerly called Olympus) make excellent Micro Four Thirds sensor systems, which unfortunately haven’t kept up with rival travel cameras from 2012 through 2023.

I’ve oft admired the solid quality of recent Micro Four Thirds cameras such as Olympus (rebranded as OM System in 2022) who made my beloved OM-1N film camera back in the 1980s. But Olympus upgrades have come too late for me, such as their sensor improvement from 16 to 20 megapixels (in Olympus M1 Mark II & III in 2016 & 2020, and in M10 Mark IV in 2020). In comparison, the Sony A6xxx camera series is nearly as compact, yet collects more light onto a physically larger 24mp APS-C sensor. Pricing can also be similar comparing APS-C vs 4/3 when shopping for slightly older versions or used gear. And for zoom ranges larger than 8x, the 1″-sensor Sony RX10M4 and RX10M3 cameras beat all comers anywhere near their weight class (37 oz), with a surprisingly sharp 25x zoom system.

During the past decade, the 16-megapixel sensor and performance of the early models of Olympus M1 (Mark I, introduced in 2013) and M10 (I-III) paled in comparison to the 24-megapixel sensor APS-C systems that I used from 2012-2016 (on Sony A6300 and predecessor NEX-7, using Sony 18-200mm lens, 11x). Consider a Micro Four Thirds system with interchangeable lenses such as the Panasonic GX80 (2016). For the GX80’s weight and expense class, the Sony A6400 or A6300 cameras provide more for the money — 45% larger light-gathering sensor (APS-C), generally better quality images (24MP vs 16MP), better viewfinder, excellent hybrid focus system, and longer battery life (400 versus 290 shots per charge), at a similar weight.

After test trials in 2016, I switched from APS-C to the 20MP 1-inch-sensor Sony RX10M3, which more than doubled my optical zoom to 25x, while equaling or improving overall image quality from edge-to-edge. Upgrading to Sony RX10M4 in 2018 strengthened the deal by speeding autofocus. This sharp 24-600mm f/2.4-4 zoom camera system weighing just 37 ounces has been a game-changer for hiking and general travel photography. Caveat: although it’s one of the most versatile cameras ever invented, Sony RX10M4 isn’t necessarily the most optimal for night photography, wedding photography, or certain other specialties that don’t require a large zoom range.

Consider the Sony RX10M4 camera — to emulate that 25x zoom range with Micro 4/3 lenses is a heavier and pricier proposition, debatably without a commensurate gain in image quality. For example, consider the following high-quality 69+ ounce system with two lenses covering 24-800mm equivalent zoom range mounted on a Micro Four Thirds sensor:

  • Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 Power OIS lens (2016, 35 oz, 72mm filter size, 3.3 x 6.8″), mounted on Panasonic DMC-GX9 mirrorless camera (2018, 14 oz body, 20mp, 260 shots per battery charge CIPA), both weather-sealed.
  • Add 20+ ounces for one or more zoom lenses to cover 24-200mm equivalent.
  • That totals 69 ounces for an impressive 24-800mm equivalent system (14 oz body + 35 oz + 20 oz) using two lenses spanning a 33x zoom range. Although overly hefty for hiking, this system might attract a vehicle-based photographer who considers incremental image quality gains to be more important than the extra system cost, bulk, weight, or inconvenience of swapping lenses.

Full-frame-sensor Cameras

Compared to APS-C, the step up to full-frame-sensor cameras costs extra, adds bulk, and is only needed if you regularly shoot in dim light higher than ISO 6400 (such as for indoor action), or specialize in night photography, or often print images larger than 2 or 3 feet in size (to be viewed closer than their longest dimension by critically sharp eyes). But there’s no need to go overboard. Let’s put this in perspective: huge effective billboards can be printed from small 3-megapixel cameras (read my article).

How to compare cameras

  • My CAMERAS article updates Light Travel camera recommendations several times per year.
  • If possible, compare cameras shot side-by-side under a variety of actual field conditions — which I do just before selling a former camera to confirm the quality of the new replacement camera. I like to “pixel-peep” a side-by-side comparison of two different cameras capturing the same subject under same lighting conditions. Be sure to mentally or digitally normalize any two given shots to compare their fine detail as if printed with equal overall image size.
  • Judge image quality and resolution at 100% pixel enlargement at the authoritative dpreview.com (owned by Amazon since 2007) and handy Comparometer at imaging-resource.com, using standardized studio test views for many cameras.
  • Side-by-side telephoto zoom comparisons between different camera systems are usually unavailable online, so I compare them myself, within the return policy window.

Yearly advances of 2014-16 put the sweet spot for serious travel cameras between 1”-Type and APS-C size sensors. Then from 2016-2022, camera designs using 1”-Type sensors surpassed the portability of APS-C models for capturing publishable images within a wider zoom range.

Most cheaper compact cameras have smaller but noisier sensors such as 1/2.3″ Type (6.17 x 4.56 mm) — tiny enough to miniaturize a superzoom lens, but poor for capturing dim light or for enlarging prints much beyond 12-18 inches.

Smartphones can have even tinier sensors, such as 1/3.0″ Type (4.8 mm x 3.6 mm) in Apple iPhone versions 5S through 8. Remarkably, top smartphone cameras have improved miniature sensors to the point where citizen journalists can capture newsworthy photos with image quality good enough for fast sharing and quick international publication. The latest Google Pixel, Samsung Galaxy, and Apple iPhones include great cameras, especially the pro models. My former Samsung Note5 smartphone (same camera as in S6 & S7 with 1/2.6″ sensor) captures sunny 16-megapixel images sufficient to make a sharp 18-inch print, virtually indistinguishable from that taken by a larger camera.

Smartphone tips: To better isolate subjects at a distance, update your model with a bigger telephoto camera, such as on the latest iPhone Pro Max or Pro models. Better yet, Samsung Galaxy S22 Ultra and S23 Ultra include an impressive 10x optical zoom, which works great, Tom can attest! A 2x power tele on a smartphone resembles the field of view of a 50mm-equivalent lens, 3x resembles 75mm, and the extremely useful 10x resembles 260mm. Tiny subjects can be enlarged biggest at close focus using the telephoto lens (like a macro lens). Avoid the digital zoom on smartphones, which records extra pixels without adding quality — instead, move closer before shooting, or crop at editing time.

Read this pointed perspective on how far image quality has progressed from early DSLR to 2014 smartphone cameras. Historically, evocative images can certainly be captured regardless of camera size or modernity. But for a given year of technological advance, tiny-sensor cameras can have severe limitations compared to physically larger cameras in terms of print enlargement, autofocus speed, blurred performance in dim/indoor light, and so forth. That being said, the “best” travel camera is the one that you are willing to carry.

More details:

The non-standardized fractional-inch sensor sizing labels such as 1/2.5-inch Type and 1/1.7″ Type confusingly refer to antiquated 1950s-1980s Vidicon video camera tubes. When you see those archaic “inch” size labels, instead look up the actual length and width in millimeters reported in the specifications for each camera:

Table of camera sensor size, area, and diagonal crop factor relative to 35mm full-frame

(Turn your mobile device sideways to see the full width of the following table.)

Sensor Type Diagonal (mm) Width (mm) Height (mm) Sensor Area (in square millimeters) Full frame sensor area is x times bigger Diagonal crop factor* versus full frame
1/3.2″ (Apple iPhone 5 smartphone 2012) 5.68 4.54 3.42 15.50 55 7.6
1/3.0″ (Apple iPhone 8, 7, 6, 5S smartphone) 6.00 4.80 3.60 17.30 50 7.2
1/2.6″ Type (Samsung Galaxy S9, Note9, S8, S7, S6, Note5) 6.86 5.5 4.1 22.55 38 6.3
1/2.5″ Type 7.18 5.76 4.29 24.70 35 6.0
1/2.3″ Type (Canon PowerShot SX280HS, Olympus Tough TG-2) 7.66 6.17 4.56 28.07 31 5.6
1/1.7″ (Canon PowerShot S95, S100, S110, S120) 9.30 7.44 5.58 41.51 21 4.7
1/1.7″ (Pentax Q7) 9.50 7.60 5.70 43.30 20 4.6
2/3″ (Nokia Lumia 1020 smartphone with 41MP camera; Fujifilm X-S1, X20, XF1) 11.00 8.80 6.60 58.10 15 3.9
Standard 16mm Film Frame 12.7 10.26 7.49 76.85 11 3.4
1” Type (Sony RX100 & RX10, Nikon CX, Panasonic ZS100, ZS200, FZ1000) 15.86 13.20 8.80 116 7.4 2.7
Micro Four Thirds, 4/3 21.60 17.30 13 225 3.8 2.0
APS-C: Canon EF-S 26.70 22.20 14.80 329 2.6 1.6
APS-C: Nikon DX, Sony NEX/Alpha DT, Pentax K 28.2 – 28.4 23.6 – 23.7 15.60 368 – 370 2.3 1.52 – 1.54
35mm full-frame (Nikon FX, Sony Alpha/Alpha FE, Canon EF) 43.2 – 43.3 36 23.9 – 24.3 860 – 864 1.0 1.0
Kodak KAF 39000 CCD Medium Format 61.30 49 36.80 1803 0.48 0.71
Hasselblad H5D-60 Medium Format 67.08 53.7 40.2 2159 0.40 0.65
Phase One P 65+, IQ160, IQ180 67.40 53.90 40.40 2178 0.39 0.64
IMAX Film Frame 87.91 70.41 52.63 3706 0.23 0.49

* Crop Factor: Note that a “full frame 35mm” sensor/film size (about 36 x 24 mm) is a common standard for comparison, having a diagonal field of view crop factor of 1.0. The debatable term crop factor comes from an attempt by 35mm-film users to understand how much the angle of view of their existing full-frame lenses would narrow (increase in telephoto power) when mounted on digital SLR (DSLR) cameras which had sensor sizes (such as APS-C) which are smaller than 35mm.

With early DSLR cameras, many photographers were concerned about the loss of image quality or resolution by using a digital sensor with a light-gathering area smaller than 35mm film. However, for my publishing needs, APS-C-size sensor improvements easily surpassed my scanning of 35mm film by 2009.

An interesting number for comparing cameras is “Full frame sensor area is x times bigger” in the above table.

  • In comparison to full a frame sensor, a pocket camera’s 1/2.5-inch Type sensor crops the light gathering surface 6.0 times smaller diagonally, or 35 times smaller in area.
  • An APS-C size sensor gathers about 15 times more light (area) than a 1/2.5” Type sensor and 2.4 times less than full frame.
    • APS-C sensors in Nikon DX, Pentax, and Sony E have 1.5x diagonal field of view crop factor.
    • APS-C sensors in Canon EF-S DSLRs have 1.6x diagonal field of view crop factor.
  • 1 stop is a doubling or halving of the amount of gathered light. Doubling a sensor’s area theoretically gathers one stop more light, but depends upon lens design.

Lens quality & diameter also affect image quality

For improving image quality, the quality and diameter of the lens can rival the importance of having a physically larger sensor area. Prime (non-zoom) lenses usually are sharpest for larger prints, but zoom lenses are more versatile and recommended for travelers.

A small sensor can beat larger with newer design (BSI) plus faster optics:

In my side-by-side field tests, the sharp, bright 25x zoom of Sony RX10 III (read my version IV review) resoundingly beats the resolution of 11x SEL18200 lens on APS-C Sony A6300 at 90+ mm equivalent telephoto, even as high as ISO 6400. (Wider angle zoom settings show little quality difference.) Apparently RX10’s faster f/2.4-4 lens plus backside illumination (BSI) technology magically compensate for the sensor size difference, 1″-Type versus APS-C. Like most APS-C-sensor cameras in 2016, A6300 lacks BSI. Surprisingly little noise affects RX10’s image quality at high ISO 6400 in dim light. Its larger lens diameter gathering more light also helps in this comparison (72mm filter size of RX10 III versus 67mm SEL18200 on A6300).

Larger lens diameter can help dim light photography:

In my field tests, the sharpness of Sony’s high-quality SEL1670Z 3x zoom f/4 lens on A6300 is only about 5% better than Sony RX10 III f/2.4-4 in bright light in the wider half of its 24-105mm equivalent range, but no better in dim light. I expect that RX10’s catch-up in quality under dim light is due to superior light sensitivity of BSI sensor plus larger lens diameter gathering more light, 72mm versus 55mm.

Using sweet spot of full-frame lenses on APS-C may not improve quality:

In principle, you might expect a slightly sharper image on an APS-C sensor when using the sweet spot of a lens designed for a full frame (which has a larger imaging circle), but results actually vary, especially when using older film-optimized lenses. In fact, a lens which is designed and optimized specially “for digital, for APS-C” can equal or exceed the quality of an equivalent full-frame lens on the same sensor, while also reducing bulk and weight (as in the Sony E-mount example further below).

Theoretically, new full-frame lenses “designed for digital” (using image-space telecentric design) may perform better on a digital sensor than would older lenses designed for film:

  • Unlike film, digital sensors receive light best when struck squarely rather than at a grazing angle.
  • Digital cameras perform best with lenses optimized specially “for digital”, using image-space telecentric designs, in which all the rays land squarely on the sensor (as opposed to having incoming rays emerge at the same angle as they entered, as in a pinhole camera). The light buckets (sensels) on digital sensors require light rays to be more parallel than with film (to enter at close to a 90 degree angle to the sensor).
  • Film can record light at more grazing angles than a digital sensor. Because older film-optimized lenses bend light to hit the sensor at more of a glancing angle, they reduce light-gathering efficiency and cause more vignetting around the edges (which is somewhat mitigated by the image circle being cropped by the APS-C sensor, which uses just the center part of the full-frame lens).
Side-by-side testing works better than theory to distinguish lenses:

Compare the following two Sony E-mount zoom lenses, full-frame versus APS-C:

  1. 2015 full-frame “Sony E-mount FE 24-240mm f/3.5-6.3 OSS” lens (27.5 oz, 36-360mm equivalent).
  2. 2010 APS-C “Sony E-mount 18-200mm f/3.5-6.3 OSS (silver SEL-18200)” lens (18.5 oz, 27-300mm equiv).

Both lenses are optimized for digital, yet the APS-C lens is much lighter weight and performs equal to or better than the full-frame lens. Side-by-side comparisons and also DxOMark tests on a Sony A6000 camera show that while they are about equally sharp, the Sony 24-240 has more distortion, vignetting and chromatic aberration than the 18-200mm.

Raw format

Cameras rarely capture pictures the way we perceive. Think of all those shots where the sky is too bright or the foreground is too dark, losing crucial detail — irrecoverably in a lossy JPEG file. Reshooting to adjust the exposure is often helpful, but usually isn’t enough to properly portray the range of light from dark to bright. We must compensate through editing to restore images to what our eyes saw in the field.

For tonal editing, camera raw file format allows 16 times more leeway than default JPEG files. Tom highly recommends recording and editing images using your advanced camera’s raw file format (except in smartphones, where the default HDR-generated JPEG files may make raw irrelevant). Editing raw format can magically recover several stops of highlight and shadow detail which would be lost (truncated) in JPEG file format (if overexposed or underexposed).

Despite advanced circuitry, cameras are not smart enough to know which subjects are supposed to be white, black, or midtone in brightness. By default, all cameras underexpose scenes where white tones (such as snow) predominate, and overexpose highlights in scenes where black tones predominate. IMPORTANT TIP: To correctly expose for all tones, you need to lock exposure upon a perceived midtone (such as a gray card; or on a line halfway between light and shadow) in the same light as your framed subject.

For greatest editing flexibility, rather than shooting JPEG format, serious photographers should record and edit images in raw format, which is supported in advanced cameras (but often not in small-sensor devices). Editing raw format fully recovers badly-exposed images − allowing you to “point and shoot” more freely than with JPEG. Even so, I carefully shoot to expose each histogram to the far right while avoiding truncation of highlights, in order to capture the highest signal-to-noise ratio in each scene. Try to stay close to base ISO 100 or 200. I typically first shoot a test shot on automatic Aperture-preferred priority, inspect the histogram, check any blinking highlight warnings, then compensate subsequent shots using Manual Exposure (or temporary Exposure Lock grabbed from the scene). Tonal editing of JPEGs can quickly truncate color channels or accumulate round-off errors, often making the image appear pasty, pixelated, or posterized. White Balance (Color Balance) is easily adjustable after shooting raw files, but tonal editing often skews colors oddly in JPEG. 12-bit Raw format has 16 times the tonal editing headroom and color accuracy compared to JPEG (which has only 8 bits per pixel per red, green, or blue color channel). In their favor, automatic point-and-shoot JPEG camera exposure modes get smarter every year, making advanced larger cameras less necessary for many people.

For a given year of technological advance, cameras with larger sensors typically capture a wider dynamic range of brightness values from bright to dark per image than smaller sensors, with less noise. In 2016, Sony’s 1″-Type backside illumination (BSI) sensors capture sufficient dynamic range for my publishing needs.

Using HDR (High Dynamic Range) imaging lets any size of sensor greatly increase an image’s dynamic range by combining multiple exposures — as done in modern smartphones, camera firmware, or PC imaging apps. On cameras larger than smartphones, HDR techniques are usually unnecessary due to the great dynamic range of a single raw file from 1″-Type BSI or APS-C sensors, or larger.

When using camera raw file format, to maximize dynamic range of brightness values from bright to dark, use base ISO (around ISO 100 or 200 in most digital still cameras), rather than higher ISO settings, which amplify noise (blotchiness at the pixel level, most-visibly in shadows). However, using the latest full-frame sensors at high ISO values 6400+ can capture unprecedentedly low noise and open new possibilities for dim-light action photography at hand-held shutter speeds, indoors or at night.

Without the help of a flash on nearby subjects, night and dim indoor photography is best with a full-frame sensor to gather more light with less noise. Low-noise night photography is usually best shot on a tripod at slow shutter speeds in raw format between ISO 100 and 800 (or as high as 1600-3200 on the latest large sensors). The latest top smartphones have made impressive leaps in automatic night modes.

Large sensors versus small

For a given field of view, cameras with larger sensors can achieve a shallower depth of field than smaller sensors, a feature which movie makers and portrait photographers like to use for blurring the background (at brightest aperture setting, smallest F number value) to draw more attention to the focused subject. Conversely, smaller-sensor cameras like the Sony RX10 III and RX100 III tend to be much better at capturing close-focus (macro) shots with great depth of field (especially at wide angle), at ISO up to 800. But the macro advantages of small-sensor cameras can diminish in dim light or when shooting at ISO higher than 800.

Landscape photographers often prefer to capture a deep depth of field, which can be achieved with both small and large sensor cameras. Optimal edge-to-edge sharpness usually occurs when stopping down the aperture once or twice from brightest opening, such as between f/4 to f/5.6 on 1-inch Type sensor, or between f/5.6 to f/8 on APS-C or full-frame (which also helps diminish chromatic aberrations). Stopping down further with f/numbers larger than this increases depth of field, but worsens diffraction through the smaller pupil opening (such as at f/11-f/16 on 1″ sensor or f/22 on APS-C), noticeably softening detail. Fast, high-quality lenses on full-frame sensors may be sharpest at two to three stops down from brightest aperture — check your lens on review charts. Avoid f/16, f/22, and f/32 on most cameras, unless you don’t mind the extra fuzziness.

Detailed full-frame comparison of low-light Sony A7S 12MP versus A7R 36MP

How can we distinguish the image quality captured by different cameras? Images are best compared at a normalized pixel level (with fine detail examined on a monitor as if printed with equal overall image size) after shooting side-by-side in the field with comparable lens and shutter speed settings. Consider two sibling full-frame-sensor cameras:

  1. Sony Alpha A7S (12MP of large-bucket photosites optimized for high ISO, low light, and videography plus stills, new in 2015) versus
  2. Sony Alpha A7R (36 megapixels of smaller-bucket photosites optimized for high resolution, new in 2014)

Despite its tinier but denser photosite buckets (also called sensels or pixel wells for catching light photons), the 36MP Sony Alpha A7R beats the dynamic range of 12MP Sony Alpha A7S in a normalized comparison of raw files (see dpreview article). While both cameras spread their photosites across the same surface area of a full-frame sensor, the 36MP A7R trumps the 12MP A7S for exposure latitude flexibility in raw post-processing at ISO 100 through 6400. Overall image quality of the 12MP A7S doesn’t beat the A7R until ISO 12,800 and higher (but only in the shadows through midtones under low-light conditions). Sony A7S is better for low-light videographers, whereas A7R is better for low-light landscape photographers who value high resolution and dynamic range.

As an Amazon Associate, I earn from qualifying purchases. To support my work:
Buy any products at Amazon.com 

67 thoughts on “Compare digital camera sensor sizes: 1″-Type, 4/3, APS-C, full frame 35mm”

  1. Hello, impressed by your reviews on Sony RX10 iv versatility and wondering how it would compare to the 2x expensive Sony A99 II full sensor utilizing my old Minolta Maxxum 7000 film camera 35-70 & 75-300mm lenses & maybe my old 2800AF flash assuming it also works with the A99 II? I think I’d carry the RX10 iv more often for vacations, car shows, etc.
    I can take some decent iPhone 6s+ photos but am exceeding frustrated by anything ‘creative’ I used to do with my Minolta & the Nikon F4 (super heavy battery pack) film cameras with 18-35 & 28-200 Nikkor lenses like macro shots, telephoto images of iguanas, car hood ornaments, etc…
    Or a Nikon 850 & reuse my Nikkor lenses. I think since Sony has image stabilization in camera it’d be better than Nikon option…

    1. Image stabilization (such as Nikon VR or Sony OSS) is critical for travel photography. The Sony A99 II body has 5-Axis Sensor-Shift Stabilization, so even legacy A-Mount glass can be image stabilized for both for stills and video. The A99’s 42MP BSI CMOS sensor is spectacularly sharp using prime lenses: compare A99 to other cameras at dpreview. A99 looks about 50% sharper than Sony A6500 which in turn is noticeably sharper than RX10iv, especially at ISO 1600+.

      Your old 2800AF flash may need a possibly-wobbly adapter for A99 II. Using older film-optimized lenses on digital sensors may cause more vignetting and may not be quite as sharp as designed-for-digital lenses, which direct the angle of incidence more perpendicularly to reach the light buckets. But money spent upgrading to digital lenses would be better applied to an RX10iv for travel.

      Sony A99 II body weighs a hefty 30 ounces, plus bulky full-frame lenses add at least 30-40 ounces, making an overly hefty kit for travel, compared to the world’s most versatile camera, the 37-oz Sony RX10iv.

      Alan J. responded:
      Wow, great response! I think a RX10iv is the way to go… WAY better than an iPhone camera & still portable. The 72mm lens is way bigger than my A-mount lenses that are 55mm & adding $1k lenses to the $3k A99 is more camera than I need.
      The Nikon CoolPix 900 has a crazy zoom 24-2000mm but I imagine image quality really suffers at high telephoto?
      I’ve seen a couple of decent big lenses that use iPhone for viewfinder/camera brains so clip on back… any upcoming versions worthy of consideration to be truly portable for travel?

      Tom responded:
      Cropping images from the larger-sensor RX10iv at 600mm equivalent should still beat the quality of Nikon CoolPix 900 at 2000mm.

      iPhone versions 6s and later capture good quality with wide dynamic range, potentially making sharp prints up to 18 inches. But larger cameras zoom better, perform better in dim light, and can make bigger prints. If one considers attaching one of the typical 2x telephoto lenses to a phone camera, you might has well upgrade to a new iPhone having a second lens built in: iPhone 7 Plus features both an f/1.8, 28mm wide-angle lens and a 56mm telephoto lens. (Attaching a wider angle lens to a phone camera is unnecessary because stitching a Panorama is better.)

      Rather than tacking lenses onto the iPhone, I would recommend investing in a pocketable Panasonic ZS100 (or larger camera like Sony RX10iv, since your interest in the huge A99 shows admiration of capturing high quality images).

  2. Hi Tom,
    Great article. I am looking at the Sony RX10 iv for a safari in Africa I plan to take in June. Can you explain the pros/cons vs a Nikon D7500 with a Nikon 18-300mm VR AF-S NIKKOR 1:3.5-5.6G ED. I know the spec difference but will one provide better images with more easy? …same thing for the Nikon D500. I know it has the same sensor but it is faster and has improved focus but without Scene modes and flash.

    1. Lucky you going to Africa! The Sony RX10 iv will be easier to use and generally sharper than Nikon D7500 mounted with 18-300mm, especially at telephoto. Sony achieves the better performance with a combination of 1-stop brighter lens aperture throughout the zoom range; high quality ZEISS® Vario-Sonnar T* optics; plus more-efficient stacked backside illumination (BSI) sensor technology (not yet available for Nikon APS-C).

      You’ll see the biggest difference in sharpness away from the center frame, especially above 90mm+ equivalent telephoto, where the RX10 really excels. Despite the physically smaller sensor, I would expect RX10 iv to beat this 18-300mm outfit, even as high as ISO 6400, in head to head tests, based upon my experiences with Sony and Nikon gear like this. At wider angles, 27-80mm equivalent, both capture similar quality in bright outdoor light. Shoot the RX 10iv optimally sharpest at f/4-5.6 as you zoom from wide to tele. Shoot the 18-300mm sharpest at f/5.6-f/8 as you zoom as shown here: http://www.imaging-resource.com/lenses/nikon/18-300mm-f3.5-5.6g-ed-vr-dx-af-s-nikkor/review/

      In very dim indoor or night lighting, Nikon D7500’s larger sensor mounted with 18-300mm may theoretically resolve more detail than RX10 at wide angles of view (not at tele), but not by much. Dedicated night photography is more appropriately the realm of full frame sensor cameras with fast prime lenses, anyway. RX10iv will do great handheld from dawn to dusk; at night use low ISO 100 up to 800 and tripod. Or I like to handhold in dim light, like in a cave or dim museums, using Sony’s Handheld Twilight Mode, which stitches several shots into a JPEG, with several stops less noise than a single shot would have. Otherwise, always shoot raw format for superior editing leeway.

      Advantageously, RX10 stretches to a wider view of 24mm equivalent. The 18-300 only reaches from 27-450mm equivalent, a 17x zoom, whereas RX10 iv reaches angles of view from 24-600mm equivalent, an impressive 25x zoom, remarkably sharp throughout, considering its portability.

      Focusing ability through the viewfinder may be roughly similar with the new RX10 iv versus DSLRs like Nikon D7500, except D7500 is better at focus tracking in action shots (which I never use anyway).

      Nikon D7500 has an optical viewfinder, if you like that kind of thing. Optical viewfinders have an advantage seeing to compose and focus at night, when an EVF is basically black unless you can focus on something brighter in the sky. But I prefer digital, EVF viewfinders, which show the close-to-final digital image continuously as you compose, plus all the shot and playback info desired. Menus behave the same on both EVF and LCD on Sony, but differ in complex ways on D7500, making D7500 harder to remember how to use. RX10 iv has a stunningly large, sharp EVF. Buy extra batteries for the Sony, as it can use power twice as fast.

      Shooting images using the LCD will be better on RX10 iv than D7500, since most DSLRs focus sluggishly when using an LCD (due to poor contrast detection), forcing you to mostly use the optical viewfinder on DSLRs.

      The same reasoning applies to D500. Nikon D500 is mainly advantageous for faster sports autofocus with more effective tracking of fast-moving subjects (which I don’t typically use, but RX10iv now tracks much better than RX10iii, using “Lock-on AF: Flexible spot M” focus area).

      By comparison, the 24MP Sony A6500 (16 oz body) looks a tad sharper than both the 21MP Nikon D500 (see dpreview.com) and D7500 in tests using prime lenses. The Nikon 18-300mm 3.5-5.6G captures similar quality to the 18-200mm lenses that I formerly used on Nikon and Sony cameras – lenses which I’ve tested and given up in favor of Sony RX10iii and iv.

      For travel weight, the 30.3-oz D500 plus 29.3-oz 18-300mm 3.5-5.6G ED weighs 60 ounces, compared to just 37 ounces for Sony RX10iv, which I expect to be sharper edge-to-edge above about 90mm+ equivalent telephoto.

  3. Hi! Great article, by the way. I have a a6000 with the 16-50 kit lens, and recently purchased a RX10 I (due to the fact that a 24-200mm was enough for me and I had read great things about the RX10).
    I’ve done several tests between a6000 with kit lens and the RX10, expecting the RX10 to beat the kit lens of the a6000.
    The fact is that the RX10 has a good performance from F2.8 to F7. But from F8 onwards the quality starts to decrease serioulsy, and when you reach the F16 the quality plummets. Therefore, I thinkj from my tests, the RX10 is not valid for landscapes because you have low quality picture both in dim light situations and at narrow apertures, when you want that effect of the sun. (and all of this with ISO at 100). Obviously when you have to increase it, the quality goes down, much more severally than in the A6000 (so the RX10 is not valid for milky ways or similar nighty shots).

    The only aspect in which RX10 bets the A6000 with the 16-50 is a bit the quality in wide apertures and close subjects (and of course the reach of that zoom) as well as the bokeh effects. But, all in all, amazingly the 16-50 is BETTER in low light situations and in F8 onwards… which dissapointed me, since I was expecting the RX10 I to be my high quality all-in-all camera.

    1. I suggest the following tips to even out the playing field when comparing Sony RX10 and A6000 for landscape photography:

      For fairer comparison at the same depth of field, we should compare Sony RX10’s f/7 with f/12.6 on Sony A6000. The actual hole size diameter is much smaller on the RX10 for a given f/stop when compared with A6000 lenses. [You can calculate this as the diagonal crop factor difference of 1.8 times larger, between APS-C and 1″ sensors. That is 2.7 divided by 1.5 = 1.8; and 1.8 times 7 = 12.6.]

      When using “equivalent apertures” you’ll find that RX10 makes a good lightweight landscape camera, except at night, where A6000’s sensor (3.2 times bigger in area) should be less noisy, especially when compared above base ISO. In its favor, RX10 helps make up the sensor size difference its more efficient BSI sensor design, sharper glass from edge-to-edge, and its lens with brightest aperture f/2.8 being two-thirds of a stop brighter than f/3.5 on your A6000. Both edges and center of RX10 images tend to be sharp compared to soft edges on A6000’s kit 16-50mm lens. RX10 landscape quality is surprisingly good in this portable 8x zoom, except at night (dim light).

      Important tips:
      – On RX10 version 1, about f/4 – f/5.6 is sharpest as you zoom from 24-200mm equivalent.
      – On A6000 using Sony E 16-50mm f/3.5-5.6 PZ OSS SELP1650 lens, about f/5.6 – f/8 is sharpest as you zoom. Confirm this at a lens review site: http://www.imaging-resource.com/lenses/sony/e-16-50mm-f3.5-5.6-pz-oss-selp1650/review/
      So I usually use the above camera-specific settings for sharpest landscape photography. Here’s why:

      If you use too small of an aperture such as a number higher than f/8 on RX10, diffraction will severely fuzz the image quality; not usually recommended on a 1″ sensor. At the other extreme, the widest aperture tends to introduce chromatic aberrations which decrease image quality. So optimum sharpness for most lenses is usually an aperture of around one or two stops down from brightest aperture. Stopping down even further achieves deeper depth of field, but at the cost of increasingly blurred detail due to diffraction through a smaller hole diameter.

      For a more practical aperture quality comparison between cameras having different sensor sizes, we should compare performance at “equivalent apertures,” which are the actual hole sizes, which physically affect depth of field (which is the main reason to choose apertures differently for landscapes versus portraits). “Equivalent aperture” is proportional to diagonal crop factor. Diagonal crop factors relative to full frame sensors are as follows:

      Example 1: f/5.9 on RX10
      Full frame sensor crop factor = 1.0; so what is the equivalent hole size for f/16 on the smaller sensor cameras? (Full frame sensor size is the common standard of comparison, albeit arbitrary.) Here’s the calculation:
      – A6000’s APS-C sensor size crop factor = 1.5. So divide f/16 on full frame by 1.5, to get f/11 as A6000’s “equivalent to f/16 on full frame” in terms of actual hole size.
      – RX10’s 1″ sensor size crop factor = 2.7. So divide f/16 on full frame by 2.7, to get f/5.9 as RX10’s “equivalent to f/16 on full frame” in terms of actual hole size.

      Example2: f/7 on RX10
      What aperture is required on the smaller sensor cameras to get the physical hole size for f/18.9 on full frame? Here’s the calculation:
      – f/18.9 on full frame divided by 1.5 is f/12.6 on A6000 to get the same hole size, for same depth of field.
      – f/18.9 on full frame divided by 2.7 is f/7 on RX10 to get the same hole size, for same depth of field.

      Example 3: f/2.8 on RX10
      What aperture is required on the smaller sensor cameras to get the physical hole size for f/7.6 on full frame? Here’s the calculation:
      – f/7.6 on full frame divided by 1.5 is f/5 on A6000 to get the same hole size, for same depth of field.
      – f/7.6 on full frame divided by 2.7 is f/2.8 on RX10 to get the same hole size, for same depth of field.

      Thanks reporting your test results. I commend your curiosity.

      1. Thank you very much for the quick and complete reply. I did not know about the aperture conversion between 1″ sensor and the APS-C. About that, I’m not sure if, for example, the RX10 at f/7 will have the same depth of field/depth of focus than the a6000 at f/12.6. Anyway, I really wanted to give a use for RX10 at F/16 because I like the sun starbust efect during sunsets, and I feel that with this camera won’t be an option.

        Actually, I tried to find a good lense for the A6000, but as the only option that seems to beat the kit lens in the prohibitive Zeiss 16-70 I though it it might be more suitable for me to get a good bridge camera as the RX10. I don’t know it the RX10 m3 is better than the RX10 m1, but, I’m afraid that in terms of picture quality there’s no difference, “just” the 200 to 600mm extra zoom, and the slow motion video option.

        Before thinking of returning the lense I have some days in which I’ll test the lense in more conditions. Meanwhile, there is any proper option for a guy like me, who basically enjoys landscape and nocturne photography, but also portraits.
        I know there are some good prime lens, like the Sigma 19mmf/2.8 or Rokinon 21mmf/.1.4 but I’d like a all-in-all as I would’t like to change the lens everytime I want to fo a portraing or a landscape shot. Thank you very much! :)

        1. For starburst effects, I suggest getting a star filter (screw-on or handheld square glass) and shooting RX10 at its optimal f/4 (to gather 16 times as much light for better quality than at f/16, minus any losses from the star filter). The starburst at f/16 on my RX10iii is fun to play with, but it makes images extremely soft focus, which lends a more romantic appearance, when appropriate for my intentions for the scene.

          I own the Zeiss 16-70mm f/4 SEL1670Z on my Sony A6300, which is up to 15% sharper than A6300’s basic kit lens. Zeiss 16-70mm is about 5% sharper than my RX10iii from 16-50mm (24-75mm equivalent) when in direct sunlight, and for closest focus in dim light around 45mm equivalent, but otherwise not. In dim indoor light, RX10iii at its optimal f/4 setting appears about equal in sharpness to SEL1670Z at its optimal f/5.6. I didn’t test night photos, but at ISO 100 on a tripod using optimal aperture, you may not notice a huge difference. I suggest retesting at each camera’s optimal aperture at night. By the way, RX10iii and iv are one-third stop brighter (f/2.4) and slightly sharper than RX10 version i (f/2.8). In England this summer, I only used the A6300 with Zeiss 16-70mm on a tripod at night, but otherwise used RX10iii for everything else from dawn to dusk handheld, a wonderfully powerful all-in-one 25x zoom travel tool, much sharper above 90mm equivalent telephoto when compared to 11x – 15x lens alternatives on APS-C sensor cameras.

    Leave a Reply

    Your email address will not be published. Required fields are marked *