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OM System OM-1 vs Sony A7 III

The OM System OM-1 and the Sony Alpha A7 III are two enthusiast cameras that were announced, respectively, in February 2022 and February 2018. Both the OM-1 and the A7 III are mirrorless interchangeable lens cameras that are based on a Four Thirds (OM-1) and a full frame (A7 III) sensor. The OM System has a resolution of 20.2 megapixels, whereas the Sony provides 24 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
OM System OM-1
versus
Sony A7 III
OM System OM-1   Sony A7 III
Mirrorless system camera Mirrorless system camera
Micro Four Thirds lenses Sony E mount lenses
20.2 MP – Four Thirds sensor 24 MP – Full Frame sensor
4K/60p Video 4K/30p Video
ISO 80-25,600 (80 - 102,400) ISO 100-51,200 (50 - 204,800)
Electronic viewfinder (5760k dots) Electronic viewfinder (2359k dots)
3.0" LCD – 1640k dots 3.0" LCD – 922k dots
Swivel touchscreen Tilting touchscreen
10 shutter flaps per second 10 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
520 shots per battery charge610 shots per battery charge
135 x 92 x 73 mm, 599 g 127 x 96 x 74 mm, 650 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the OM System OM-1 and the Sony Alpha A7 III? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

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Body comparison

The physical size and weight of the OM System OM-1 and the Sony A7 III are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All size dimensions are rounded to the nearest millimeter.

Size OM System OM-1 vs Sony A7 III
Compare OM-1 versus A7 III top
Comparison OM-1 or A7 III rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7 III is somewhat smaller (2 percent) than the OM System OM-1. However, the A7 III is markedly heavier (9 percent) than the OM-1. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (OM-1) and the Sony FE Lens Catalog (A7 III). Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the OM-1 gets 520 shots out of its OM System BLX-1 battery, while the A7 III can take 610 images on a single charge of its Sony NP-FZ100 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
OM System OM-1 135 mm 92 mm 73 mm 599 g 520 Y Feb 2022 2,199ebay.com
2.
 
Sony A7 III 127 mm 96 mm 74 mm 650 g 610 Y Feb 2018 1,999 amazon.com
3.
 
Nikon Z6 134 mm 101 mm 67 mm 675 g 310 Y Aug 2018 1,999ebay.com
4.
 
Olympus E-M1 III 134 mm 91 mm 69 mm 580 g 420 Y Feb 2020 1,799ebay.com
5.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999ebay.com
6.
 
OM System OM-1 II 135 mm 92 mm 73 mm 599 g 500 Y Jan 2024 2,399 amazon.com
7.
 
OM System OM-5 125 mm 85 mm 50 mm 414 g 310 Y Oct 2022 1,199 amazon.com
8.
 
Panasonic G9 II 134 mm 102 mm 90 mm 658 g 390 Y Sep 2023 1,899 amazon.com
9.
 
Panasonic GH6 138 mm 100 mm 100 mm 823 g 360 Y Feb 2022 2,199 amazon.com
10.
 
Panasonic GH5 II 139 mm 98 mm 87 mm 727 g 400 Y May 2021 1,699 amazon.com
11.
 
Panasonic G95 130 mm 94 mm 77 mm 536 g 290 Y Apr 2019 999ebay.com
12.
 
Panasonic G9 137 mm 97 mm 92 mm 658 g 400 Y Nov 2017 1,699ebay.com
13.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999ebay.com
14.
 
Sony A7R IV 129 mm 96 mm 78 mm 665 g 670 Y Jul 2019 3,499ebay.com
15.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
16.
 
Sony A9 127 mm 96 mm 63 mm 673 g 650 Y Apr 2017 4,499ebay.com
17.
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The A7 III was somewhat cheaper (by 9 percent) than the OM-1 at launch, but both cameras fall into the same price category. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the OM System OM-1 features a Four Thirds sensor and the Sony A7 III a full frame sensor. The sensor area in the A7 III is 276 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the OM-1 has a native 4:3 aspect ratio, while the one in the A7 III offers a 3:2 aspect.

OM System OM-1 and Sony A7 III sensor measures

With 24MP, the A7 III offers a higher resolution than the OM-1 (20.2MP), but the A7 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 3.34μm for the OM-1) due to its larger sensor. However, the OM-1 is a much more recent model (by 3 years and 11 months) than the A7 III, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the OM-1 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Sony A7 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the OM System OM-1 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.

Unlike the A7 III, the OM-1 has the capacity to capture high quality composite images (80MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The OM System OM-1 has a native sensitivity range from ISO 80 to ISO 25600, which can be extended to ISO 80-102400. The corresponding ISO settings for the Sony Alpha A7 III are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.

In terms of underlying technology, the OM-1 is build around a Stacked BSI-CMOS sensor, while the A7 III uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

OM-1 versus A7 III MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
OM System OM-1 Four Thirds 20.2 5184 38884K/60p23.413.4155377
2.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
3.
 
Nikon Z6 Full Frame 24.3 6048 40244K/30p25.314.3329995
4.
 
Olympus E-M1 III Four Thirds 20.2 5184 38884K/30p23.313.1135676
5.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
6.
 
OM System OM-1 II Four Thirds 20.2 5184 38884K/60p23.413.6174978
7.
 
OM System OM-5 Four Thirds 20.2 5184 38884K/30p23.413.4162278
8.
 
Panasonic G9 II Four Thirds 25.0 5776 43365.7K/60p23.413.5171078
9.
 
Panasonic GH6 Four Thirds 25.0 5776 43365.7K/60p23.413.4155577
10.
 
Panasonic GH5 II Four Thirds 20.2 5184 38884K/60p23.713.1113679
11.
 
Panasonic G95 Four Thirds 20.2 5184 38884K/30p23.213.0127375
12.
 
Panasonic G9 Four Thirds 20.2 5184 38884K/60p23.112.8113874
13.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
14.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
15.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
16.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
17.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the OM-1 provides a higher frame rate than the A7 III. It can shoot video footage at 4K/60p, while the Sony is limited to 4K/30p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the OM-1 offers a substantially higher resolution than the one in the A7 III (5760k vs 2359k dots). The table below summarizes some of the other core capabilities of the OM System OM-1 and Sony A7 III in connection with corresponding information for a sample of similar cameras.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
OM System OM-15760 n3.0 / 1640 swivel Y 1/8000s 10.0/s n Y
2.
 
Sony A7 III2359 n3.0 / 922 tilting Y 1/8000s 10.0/s n Y
3.
 
Nikon Z63690 Y3.2 / 2100 tilting Y 1/8000s 12.0/s n Y
4.
 
Olympus E-M1 III2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
5.
 
Olympus E-M1 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
6.
 
OM System OM-1 II5760 n3.0 / 1640 swivel Y 1/8000s 10.0/s n Y
7.
 
OM System OM-52360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
8.
 
Panasonic G9 II3680 n3.0 / 1840 swivel Y 1/8000s 10.0/s n Y
9.
 
Panasonic GH63680 n3.0 / 1840 full-flex Y 1/8000s 14.0/s n Y
10.
 
Panasonic GH5 II3680 n3.0 / 1840 swivel Y 1/8000s 12.0/s n Y
11.
 
Panasonic G952360 n3.0 / 1240 swivel Y 1/4000s 9.0/s Y Y
12.
 
Panasonic G93680 Y3.0 / 1040 swivel Y 1/8000s 20.0/s n Y
13.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
14.
 
Sony A7R IV5760 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
15.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
16.
 
Sony A93686 n3.0 / 1440 tilting Y 1/8000s 20.0/s n Y
17.
 
Sony A7 II2400 n3.0 / 1230 tilting n 1/8000s 5.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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The OM-1 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A7 III does not have a selfie-screen.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, both cameras under consideration feature an electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The OM System OM-1 and the Sony A7 III both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The OM-1 writes its imaging data to SDXC cards, while the A7 III uses SDXC or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. However, while the OM-1 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s) on both slots, the A7 III supports UHS-II only on its first slot and UHS-I (data transfer speed up to 104 MB/s) on the second one.

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Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the OM System OM-1 and Sony Alpha A7 III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
OM System OM-1Ystereo / monoYYmicro3.0Y-Y
2.
 
Sony A7 IIIYstereo / monoYYmicro3.1YYY
3.
 
Nikon Z6Ystereo / monoYYmicro3.1Y-Y
4.
 
Olympus E-M1 IIIYstereo / monoYYmicro3.1Y-Y
5.
 
Olympus E-M1 IIYstereo / monoYYmicro3.0Y--
6.
 
OM System OM-1 IIYstereo / monoYYmicro3.0Y-Y
7.
 
OM System OM-5Ystereo / monoY-micro2.0Y-Y
8.
 
Panasonic G9 IIYstereo / monoYYfull3.2Y-Y
9.
 
Panasonic GH6Ystereo / monoYYfull3.2Y-Y
10.
 
Panasonic GH5 IIYstereo / monoYYfull3.2Y-Y
11.
 
Panasonic G95Ystereo / monoYYmicro2.0Y-Y
12.
 
Panasonic G9Ystereo / monoYYfull3.0Y-Y
13.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
14.
 
Sony A7R IVYstereo / monoYYmicro3.1YYY
15.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
16.
 
Sony A9Ystereo / monoYYmicro2.0YYY
17.
 
Sony A7 IIYstereo / monoYYmicro2.0YY-
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Studio photographers will appreciate that the OM System OM-1 (unlike the A7 III) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The A7 III is a recent model that features in the current product line-up of Sony. In contrast, the OM-1 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the OM-1 was succeeded by the OM System OM-1 II. Further information on the features and operation of the OM-1 and A7 III can be found, respectively, in the OM System OM-1 Manual (free pdf) or the online Sony A7 III Manual.

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Review summary

So what is the bottom line? Which of the two cameras – the OM System OM-1 or the Sony A7 III – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Advantages of the OM System OM-1:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better video: Provides higher movie framerates (4K/60p versus 4K/30p).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 2359k dots).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.82x vs 0.78x).
  • More detailed LCD: Has a higher resolution rear screen (1640k vs 922k dots).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More modern: Reflects 3 years and 11 months of technical progress since the A7 III launch.

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Reasons to prefer the Sony Alpha A7 III:

  • More detail: Has more megapixels (24 vs 20.2MP), which boosts linear resolution by 11%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Longer lasting: Gets more shots (610 versus 520) out of a single battery charge.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More heavily discounted: Has been around for much longer (launched in February 2018).

If the count of individual advantages (bullet points above) is taken as a guide, the OM-1 is the clear winner of the match-up (10 : 5 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

OM-1 10:05 A7 III

How about other alternatives? Do the specifications of the OM System OM-1 and the Sony A7 III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the OM-1 or the A7 III. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
OM System OM-15/5....87/1005/54.5/5 Feb 2022 2,199ebay.com
2.
 
Sony A7 III..+ +4.5/589/1005/55/5 Feb 2018 1,999 amazon.com
3.
 
Nikon Z65/5..5/589/1004.5/55/5 Aug 2018 1,999ebay.com
4.
 
Olympus E-M1 III5/5..5/583/1004.5/54/5 Feb 2020 1,799ebay.com
5.
 
Olympus E-M1 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 1,999ebay.com
6.
 
OM System OM-1 II............ Jan 2024 2,399 amazon.com
7.
 
OM System OM-55/5..4.5/583/1005/54.5/5 Oct 2022 1,199 amazon.com
8.
 
Panasonic G9 II5/5..4.5/587/100..4.5/5 Sep 2023 1,899 amazon.com
9.
 
Panasonic GH65/5+ +5/587/1005/55/5 Feb 2022 2,199 amazon.com
10.
 
Panasonic GH5 II4.5/5..4.5/585/1004.5/55/5 May 2021 1,699 amazon.com
11.
 
Panasonic G954.5/5+4.5/583/1004.5/54.5/5 Apr 2019 999ebay.com
12.
 
Panasonic G9..+ +5/585/1005/55/5 Nov 2017 1,699ebay.com
13.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 1,999ebay.com
14.
 
Sony A7R IV5/5+4.5/591/1004.5/55/5 Jul 2019 3,499ebay.com
15.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
16.
 
Sony A95/5+ +4.8/589/1005/55/5 Apr 2017 4,499ebay.com
17.
 
Sony A7 II5/5+4/582/1004.5/55/5 Nov 2014 1,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: OM System OM-1 vs Sony A7 III

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model OM System OM-1 Sony A7 III
    Camera Type Mirrorless system camera Mirrorless system camera
    Camera Lens Micro Four Thirds lenses Sony E mount lenses
    Launch Date February 2022 February 2018
    Launch Price USD 2,199 USD 1,999
    Sensor Specs OM System OM-1 Sony A7 III
    Sensor Technology Stacked BSI-CMOS BSI-CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 35.6 x 23.8 mm
    Sensor Area 224.9 mm2 847.28 mm2
    Sensor Diagonal 21.6 mm 42.8 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 20.2 Megapixels 24 Megapixels
    Image Resolution 5184 x 3888 pixels 6000 x 4000 pixels
    Pixel Pitch 3.34 μm 5.94 μm
    Pixel Density 8.96 MP/cm2 2.83 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/60p Video 4K/30p Video
    ISO Setting 80 - 25,600 ISO 100 - 51,200 ISO
    ISO Boost 80 - 102,400 ISO 50 - 204,800 ISO
    Image Processor TruePic X BIONZ X
    DXO Sensor Quality (score) .. 96
    DXO Color Depth (bits) .. 25.0
    DXO Dynamic Range (EV) .. 14.7
    DXO Low Light (ISO) .. 3730
    Screen Specs OM System OM-1 Sony A7 III
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.82x 0.78x
    Viewfinder Resolution 5760k dots 2359k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1640k dots 922k dots
    LCD Attachment Swivel screen Tilting screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs OM System OM-1 Sony A7 III
    Focus System On-Sensor Phase-detect On-Sensor Phase-detect
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 10 shutter flaps/s 10 shutter flaps/s
    Shutter Life Expectancy400 000 actuations200 000 actuations
    Electronic Shutterup to 1/32000sYES
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards MS or SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    UHS card support Dual UHS-II Single UHS-II
    Connectivity Specs OM System OM-1 Sony A7 III
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.0 USB 3.1
    HDMI Port micro HDMI micro HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication no NFC NFC built-in
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Body Specs OM System OM-1 Sony A7 III
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type OM System BLX-1 Sony NP-FZ100
    Battery Life (CIPA)520 shots per charge610 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 135 x 92 x 73 mm
    (5.3 x 3.6 x 2.9 in)
    127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 599 g (21.1 oz) 650 g (22.9 oz)
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    Check OM-1 offers at
    ebay.com
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    Check A7 III price at
    amazon.com

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