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OM System OM-1 : Specifications and Opinions

The OM System OM-1 is a mirrorless camera with 4/3 (2.0x) sensor and 20.4 megapixels manufactured from 2022 to 2024 (discontinued). The range of sensitivities, including ISO extension, is 80 - 102400 ISO and it has a continuous shooting (burst mode) of 20 FPS x 108 RAW, 116 JPEG. The average price was 1922 €;

98 users have given it an average vote of 9.5 out of 10

Sensor
Format	4/3, 17.4 x 13 mm (image ratio 4:3, crop factor 2.0x in comparison with FF)
Resolution	20.4 megapixel (pixel pitch 3.35 μm)
Sensor type	CMOS BSI Stacked (sensor readout: 1/125)
ISO sensitivities	80 - 102400
File formats	JPEG, RAW
Esposure
Shutter speeds	60" - 1/32000
Exp. compensation	+/- 5 stops at 1/3 steps
Exp. modes	M, S, A, P
Metering modes	Multi-Area, Semi-Spot, Spot
Features
Mount	Micro 4/3 (click here to view all compatible lenses)
Stabilization	Yes
Continuos shooting (with autofocus)	20 FPS x 108 RAW, 116 JPEG
Pre-Burst	Yes
Live View	Yes
Video mode	C4K (4096x2160p) @ 60 FPS
WiFi	Yes
GPS	No
USB	USB-C
USB Charging	Yes
Computing Features
ND Long Exposure	Yes, up to 64 photos (ND6)
Pixel Shift	Yes, in-camera (80 megapixel)
Focus Stacking	Yes, in-camera
Startrail/Composite mode	Yes
Astrotracer	No
Camera body and built
Touchscreen	Yes
LCD	3.0″, 1.62 Mdots, 900 x 600 pixels, fully articulating
Viewfinder	Electronic, coverage 100%, 1.48x
Viewfinder resolution	1600 x 1200 px
Flash	No
Storage	SD, SDHC, SDXC (UHS-II)
Storage, Slot 2	SD, SDHC, SDXC (UHS-II)
Shutter	Mechanical and electronic
Battery	OM System BLX-1, 16.40 Wh
Weather sealing	Yes
Weight	599 g
Dimensions	135 x 92 x 73 mm
Buy
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Reviews

What do you think about this camera?

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Arnosiemons

sent on August 22, 2022

Pros: Portability & features

Cons: None so far

Opinion: Have been working with this gem for some months now. Been working with MFT since 2013 besides my Nikon gear and have seen a steady but impressive development of this formula. For me the OM-1 (and its lenses) is all about portability while being able to produce high quality output that can compete with camera's with a larger sensor. In my opinion OM-Systems succeeded to produce a camera that does just that. There is so much to tell about this camera. To sum this review up: Fast AF, doing great on high ISO, customization and creating presets works well. Button layout. Battery life. I can go on and on.

The following opinions have been automatically translated with Google Translate.

Loriga Ivan

sent on August 28, 2025

Pros: Tropicalization, lightness, compactness, quality of files, immense and quality optics

Cons: I can't find a cons of this machine at the moment

Opinion: Fantastic machine in all respects, as always Olympus or OM system is able to add exclusive innovation to all its new products, starting from the computational functions and the new stacked sensor, lightness compactness and the possibility of mounting the fantastic lenses of Olympus Pro series, among the best lenses of all the systems I have ever tried if not the best! Lightness, compactness, sharpness performance and tropicalization of both the body and the lenses make it possible to use the system itself in conditions where the others would struggle, having tried almost all the systems except Hasselblad and Leica, at the moment I can say that Olympus with all the pros and cons is the best compromise, even the high iso speech that was the only drawback of the micro four thirds with this new sensor has improved a lot in levels by aps-c Fuji.

TheItN

sent on July 28, 2025

Pros: Market-leading Value for Money/Weight&Size ratio; Exceptional construction; Very efficient and certified tropicalization; Perfect ergonomics; Battery life; Smart computational functions that expand its versatility and differentiate it from the competition; Dual SD slots; EVFs still among the best on the market today; Flawless stabilization every time

Cons: Battery Grip with grip not at the same level as that of the machine body; Castrated buffer that limits new potential through firmware update; Keeping rate in AF-C good but not great; Non-tiltable screen

Opinion: I've been using this camera for almost 2 years and I think I know it a bit by now to write down a few lines.. As written, I still find the OM-1 a noteworthy camera today for what it offers overall. To be clear, it's not the best camera the market offers, nor has it ever been, but for the price it is at and what it offers, I think it is a very underrated and underrated camera. For less than 2K (I'm talking again, used we are not far from half in excellent condition), you take home an impeccably built magnesium body, with perfect ergonomics, a true and IP-certified weather seal, a battery that for many can also be enough for a daily photography session (I'm not a Pro, I want to say it, but with a charge less than two outputs I have never done), double SD slot (excellent, because on the one hand it guarantees an immediate backup, on the other it keeps the overall costs of the system low by spending the right amount for memories without making who knows what compromises on performance since we are talking about the UHS-II type), computational functions that make the camera even more versatile, an above-average EVF with a resolution of 5.76M, and a stabilization at the top of the contemporary photographic panorama that makes it possible to use it freehand even with the long telephoto and superzoom that the M4/3 offers. Not a little. On the other hand, there are some aspects that it is good to be aware of when buying, among them I would like to point out the BG which if on the one hand is certainly well built and shaped (once assembled you immediately notice how it was developed by OM System engineers in symbiosis with the machine, and not as a fake thing stuck there almost by mistake), on the other hand, it has a more abundant grip than the counterpart of the camera body, which for those like me who do not have huge hands perhaps tires a little in the long run (but you live with it, it is not a huge problem). More significant is instead the calibrated buffer (probably to justify that something extra that was needed to make the market after the mark II, I add), which strongly limits the expansion via firmware of new features and above all the improvement of existing but not irresistible functions. I'm talking about the graduated filters or the improvement of the keeping rate in AF-C, both introduced last year with the mark II. Mind you, you still photograph as you are now, but it certainly leaves a bit of a bitter taste in the mouth to think that where other brands (Nikon above all) firmware after firmware constantly evolve their flagships, OM System for a handful of memory less does not allow you to take full advantage of the rest of a hardware that on balance is the same as the mark II. Last among the cons I would like to mention the screen, or rather its articulation system: let's be honest, among those who buy the OM-1, how many do it to use it in the video field, perhaps even to record clips to be uploaded to YouTube? I think 0.01% of buyers, though. So why not insist on the solution already seen at Olympus, for example on the OM-D E-M10II, tiltable in axis with the lens, much more functional for a photographic practice? Again, not a cons of those that discriminate between buying and not buying the camera, but certainly it would have been better to have it in the list of pros.

Giorgio_Via

sent on July 26, 2025

Pros: waterproofing and dust protection, for the use I make of it, retractable rear display protected from bumps and scratches, the best viewfinder I have ever used, so much so that I used it practically without a display, the price, the availability of high quality optics, a very complete menu also for the possibilities offered in digital processing

Cons: with Panasonic Leica lenses a certain delay, especially for landscape or low light photographs, in focusing, an immense vastness of possible operations that I will never learn in the course of my life, the position of the power button....

Opinion: I wondered if it would be useful to review a camera that is now out of production and replaced by a newer model which, it is said, has improved some flaws. I think of those who, like me, buy second-hand equipment for work. I take photographs of buildings for which I have to carry out renovation or restoration projects, for appraisals, for site documentation, then with dust from demolitions, excavations and up and down scaffolding. I bought, several years ago, a Canon DSLR, after years of Nikon with film, to have an easily manageable digital archive. Then I switched to Fujifilm mirrorless, in order to have a pair of Zeiss lenses, wide-angle and normal, and, later, always to stay at Zeiss at Sony FF. While the optics were absolutely satisfactory, the Sony body, an a7II, was beginning to show some signs of age. I would have liked to stay at Sony but the costs of the upgrade I wanted to get were really unaffordable for me, unless I went for bodies with over 100 thousand shots. Then some friends told me about the micro 4/3 system. I looked around and, since my instinct always makes me start from lenses, I found three Panasonic Leica lenses on occasion. My choice therefore went to OM-1 which I found at a real devaluation price, with what for me represented an indispensable element, the quality of the 1600 x 1200 px viewfinder, the weight and the protection from external agents. I didn't find anything satisfactory in Panasonic that had all the features found in OM-1, at least in micro 4/3. I am, now a few months later, really satisfied with the change of system, also for the quality of the optics. It may be natural to wonder why it does not use native lenses, i.e. OM System. Well, I tried with a pro series lens of equal value to the Panasonic Leica I use and there is really no comparison, neither in the construction of the lens (wobbly barrel) nor in the quality of the images, always talking about optics under 1000 euros. The menu is exaggeratedly vast but customizable. For those who use them, the main computational functions are present (for now I have only used the simulation of the ND filter for long exposures). Present for jpg shots, the colored filters for black and white. What can I say, I'm sorry for those who bought it new, given the devaluation, but if you find one little used don't miss it. PS: the power button, positioned next to the upper ring on the left, different from all the devices I have used previously that had it in correspondence with the shutter button, is an infinite pain in the ass. Then you get used to it....

Domnet

sent on January 10, 2025

Pros: TOP ergonomics and customization, Always perfect white balance and exposure, Monstrous and small Zuiko lenses at a negligible cost compared to the competition, Beautiful color rendering and customization possibilities, Burst. Powerful computational functions with amazing results

Cons: Dynamic range not at the level of the best APS-C, Difficult to get a blur even with the F2.8 zooms because of the MFT sensor

Opinion: I sold the Om-1 to switch to Sony A6700, much praised as the best APS-C out there but between the two in my opinion the Om-1 comes out the winner, even in the noise at high ISO it comes out on top, with a noise that is always soft and pleasant. The only thing where the 6700 is superior is tracking. The Om-1's single-point autofocus, on the other hand, locks on more than the Sony. Overall, shooting with the Om-1 associated with the slow Zuiko 12-40 2.8 or the super-bright fixed is a rewarding experience. It produces beautiful images very easily. Since I got the Sony I've started to worry about white balance again, which with the OM-1 is always perfect by default.

There are 27 more reviews. Show all »

Photos taken with OM System OM-1

The magic of autumn

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The lightness of being

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At first light

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Sea Bridge

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Flapping of wings

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171 comments, 5827 views

HI RES 15.0 MP

The Awakening of the Amphibians

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The king in his temple

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Hemaris tytius

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149 comments, 8585 views

HI RES 9.9 MP

The Dew Angel

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94 comments, 3096 views

HI RES 4.2 MP

Saturnia pavoniella (male)

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65 comments, 2708 views

HI RES 7.7 MP

The fleeting moment

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117 comments, 4481 views

HI RES 6.2 MP

The classic Bobbio Bridge

by Juza
24 comments, 8336 views

HI RES 71.7 MP

Thoughts

by Maxago
27 comments, 5624 views

HI RES 17.9 MP

Decticus albifrons

by Giuseppe Dipalma
32 comments, 4900 views

HI RES 25.1 MP

The Heart of Music: Family and Melody

by Pop Csaba
32 comments, 2831 views

HI RES 16.4 MP

The Lombard countryside

by Norvegia04
174 comments, 4019 views

HI RES 17.1 MP

The dance among the flowers

by NadiaB
111 comments, 4934 views

HI RES 9.7 MP

Bobbio in the frame of the bridge

by Juza
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Comacchio

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106 comments, 5047 views

HI RES 5.9 MP

The silence of the painted egg

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Zerynthia cassandra

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Texture....

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Meeting in the beech forest

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Vanity

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Fan of wings

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The singer

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Apocalypse now

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HI RES 3.8 MP

Gilding....

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The swimming bee

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The boat....

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Monza park pond at dawn

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HI RES 6.4 MP

La Morra at dawn

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HI RES 5.0 MP

Kite

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93 comments, 2693 views

HI RES 6.8 MP

Under the snow

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104 comments, 2212 views

HI RES 18.9 MP

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Mushroom season

by Lazzaro
41 comments, 1976 views

HI RES 4.3 MP

Mandarin duck

by Ginolimbianchino
92 comments, 5176 views

HI RES 10.2 MP

Philaeus chrysops

by NadiaB
89 comments, 3123 views

HI RES 11.5 MP

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Reviews » Cameras » Cameras Olympus » OM System OM-1

OM System OM-1 : Specifications and Opinions

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Reviews

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Photos taken with OM System OM-1