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OM SYSTEM OM-3 ASTRO Mirrorless Camera

BH #OMOM3S • MFR #V7921300U000
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OM SYSTEM OM-3 ASTRO Mirrorless Camera
90-Second Intro
Key Features
  • Optimized for Astrophotography
  • IR-Cut Filter Passes H-Alpha Wavelength
  • High Res Shot for In-Camera Stacking
  • Custom Modes for Astro/Starry Landscape
A purpose-built camera for astrophotography, the OM-3 ASTRO, from OM SYSTEM, is a specialized Micro Four Thirds mirrorless body featuring adjusted optical characteristics that enable recording red nebulae, constellations, and other nighttime phenomena.
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OM SYSTEM OM-3 ASTRO Overview

Dedicated to Astrophotography
A purpose-built camera for astrophotography, the OM-3 ASTRO, from OM SYSTEM, is a specialized Micro Four Thirds mirrorless body featuring adjusted optical characteristics that enable recording red nebulae, constellations, and other nighttime phenomena.
Capture Hydrogen-Alpha Wavelengths
The key distinction of this specialized camera is an IR-cut filter that has been placed in front of the sensor, achieving 100% transmission of Hα (hydrogen-alpha) wavelengths. This, coupled with the TruePix X processor, allows the camera to record accurate detail, shape, and color of diffuse nebulae and other celestial objects.
Image Stacking and Hi Res Shot Mode
The High Res Shot mode is a computational function that combines information from multiple, sequentially recorded frames and composites it in-camera into a single high-resolution image. For the OM-3 ASTRO, the Handheld High Res Shot mode is the preferred mode, even when working from a tripod or equatorial mount, to capture and composite 12 separate frames into 50MP image with reduced image noise, no subject blur, and greater detail.

Since the position of each image is matched when compositing, this handheld mode will also correct the diurnal motion of stars from a tripod or other star misalignment or tracking errors caused by an equatorial mount.
Custom Modes and Other ASTRO Features
  • Preprogrammed COLOR settings make it easy to get started photographing astro scenes and starry landscapes right away—the COLOR1 setting optimizes color and camera settings for astrophotography scenes, like when photographing nebulae, and the COLOR2 setting is optimized for starry landscape scenes.
  • The C1, C2, and C3 custom modes have also been preset for different shooting situations—C1 is a frame stacking mode for astrophotography, C2 is a frame stacking mode for starry landscapes, and C3 is the handheld mode for starry landscapes.
  • Other key features already featured in the standard OM-3 are greatly beneficial to the specialized needs of astrophotography, including Starry Sky AF, Live Composite, the digital level, support for power delivery via USB while shooting, and a Night View mode.
Astrophotography Accessory Filters
Beyond the modified camera, there are also a pair of optional specialized filters to enhance the quality and clarity of astro and starry sky photos. Both of these filter are body mount filters, too, and can be inserted within the lens mount to make them usable with any attached lens, including fisheyes and ultra-wides:
  • The BMF-LPC01 Light Suppression Filter cuts stray light from artificial light sources, like street lamps, for more vividness and clarity when photographing near cities.
  • The BMF-SE01 Soft Filter can slightly blur and soften the point light rendering of stars to make them appear more significant within the frame.
Based on the Original OM-3
The OM-3 delivers flagship-level performance, customizable creative tools, and robust video capabilities, making it a great camera for a range of astro and starry sky scenes. Adopting the 20MP Stacked BSI Live MOS MFT Sensor, TruePic X engine, and the 1053 AF points native to the OM-1 Mark II, this compact system proves to be a giant in capabilities.
Timeless Elegance and Innovative Design
The OM-3 prides itself on conserving the timeless elegance of the SLR camera. Its design repurposes the traditional dials to provide valuable access to customizable tools, such as a creative dial that allows easy transition between custom profiles, an intuitive button that unifies computational features such as Live ND and GND, focus stacking, and more.

With easy access to the computational photography button, the user is allowed to harness a wide array of creative tools, such as capturing light trails free from urban light pollution or combining various focus points to capture the wonders and details hidden in the world of macro photography.
5-Axis Image Stabilization
The OM SYSTEM 5-axis image stabilization provides up to 6.5 shutter speed stops of compensation for the center and 5.5 stops for the corner. When paired with compatible lenses, the camera supports Sync IS delivering even more powerful image stabilization at up to 7.5 shutter speed stops at the center and 6.5 stops at the corner, ensuring blur-free images in a variety of scenarios.
Video Features
Also optimized for video creators, the OM-3 allows for 4K video recording at up to 60p, seamless mode switching, heat management for extended recording, and new OM-Cinema video profiles. The dedicated video dial makes switching between still, video, and S&Q mode a breeze, easily recording slow or quick motion videos at frame rates ranging from 1 to 120 fps.
Additional Features
  • IP53 splash and dust resistance ensures reliable performance in harsh conditions
  • 1053-point Cross-Type On-chip Phase Detection Quad Pixel AF
  • AI Detection AF for subjects including people, motorsports, birds, and pets
  • Starry Sky AF for astrophotography
  • High-speed sequential shooting at up to 120 fps with AF tracking at 50 fps
  • Pro Capture Mode to capture up to 70 frames before fully pressing the shutter
  • Custom Mode Labels for personalization of settings
  • Custom setting options for activating video modes Supports integration with video recording lights
UPC: 050332195998

OM SYSTEM OM-3 ASTRO Specs

Key Specs
Lens Mount
Micro Four Thirds
Effective Sensor Resolution
20.4 Megapixel
Image Sensor
Four Thirds
Image Stabilization
Sensor-Shift
ISO/Gain Sensitivity
Native: 200 to 25,600
Max Recording Modes
H.264/H.265/MOV/MPEG-4 AVC 4:2:0 8/10-Bit
Up to DCI 4K at 23.98/24.00/25/29.97/50/59.94 fps
Max Video Output
4:2:2/4:2:0 8/10-Bit
Up to DCI 4K
Media/Memory Card Slot
Single Slot: SD/SDHC/SDXC (UHS-II)
Video I/O
1x Micro-HDMI Output
Audio I/O
1x 1/8" / 3.5 mm TRS Stereo Headphone Output
1x 1/8" / 3.5 mm TRS Stereo Microphone Input
Power I/O
1x USB-C Input
Other I/O
1x USB-C (Data) Output (Shared with Power Input)
Wireless
Wi-Fi 4 (802.11n) / Bluetooth 4.2
Display Type
Articulating 3" Touchscreen LCD
Battery
1x BLX-1 Rechargeable Lithium-Ion (Included)
Imaging
Lens Mount
Micro Four Thirds
Effective Sensor Resolution
Effective: 20.4 Megapixel
Actual: 22.9 Megapixel
Image Sensor
17.4 x 13 mm (Four Thirds) BSI Stacked MOS
Sensor Crop (35mm Equivalent)
Crop Factor: 2x
Image Stabilization
Sensor-Shift, 5-Axis
Built-In ND Filter
No
Capture Type
Stills & Video
Exposure Control
Shutter Type
Mechanical Focal Plane Shutter and Electronic Rolling Shutter
Shutter Speed
Electronic Shutter
1/32000 to 60 Seconds

Electronic Front Curtain Shutter
1/320 to 60 Seconds

Mechanical Shutter
1/8000 to 60 Seconds
Bulb/Time Mode
Bulb Mode
ISO/Gain Sensitivity
Native: 200 to 25,600
Metering Method
Center-Weighted Average, Multi-Zone, Spot
Exposure Modes
Aperture Priority, Manual, Program, Shutter Priority
Exposure Compensation
-5 to +5 EV (1/3, 1/2, 1 EV Steps)
Metering Range
-2 to 20 EV
White Balance
2000 to 14,000K
Presets: AWB, Custom, Flash, Fluorescent, Overcast, Shade, Sunlight, Tungsten, Underwater
Continuous Shooting
Up to 120 fps at Maximum Resolution
Interval Recording
Yes
Self-Timer
2/12-Second Delay
Still Image Capture
Aspect Ratio
4:3
Image File Format
JPEG, Raw
Bit Depth
14-Bit
Video Capture
Internal Recording
H.264/H.265/MOV/MPEG-4 AVC 4:2:0 8/10-Bit
4096 x 2160 at 23.98/24.00/25/29.97/50/59.94 fps (77 to 205 Mb/s)
3840 x 2160 at 23.98/25/29.97/50/59.94 fps (77 to 205 Mb/s)
1920 x 1080 at 23.98/25/29.97/50/59.94 fps (22 to 205 Mb/s)
Video Output
4:2:2/4:2:0 8/10-Bit
4096 x 2160
3840 x 2160
1920 x 1080
1280 x 720
Fast-/Slow-Motion Support
Yes
Gamma Curve
FLAT, HDR-HLG, OM-Cinema1, OM-Cinema2, OM-Log
Recording Limit
2-Hour Maximum in 4K
IP Streaming
No
Built-In Microphone
Stereo
Audio Recording
16-Bit 48 kHz LPCM Audio
Interface
Media/Memory Card Slot
Single Slot: SD/SDHC/SDXC (UHS-II)
Internal Storage
No
Video I/O
1x Micro-HDMI Output
Audio I/O
1x 1/8" / 3.5 mm TRS Stereo Headphone Output
1x 1/8" / 3.5 mm TRS Stereo Microphone Input
Power I/O
1x USB-C Input
Other I/O
1x USB-C (Data) Output (Shared with Power Input)
Wireless
Wi-Fi 4 (802.11n) / Bluetooth 4.2
Mobile App Compatible
Yes: Android & iOS
App Name: OM Image Share
Functionality: Access Stored Files, Remote Control, View Live Feed
Global Positioning (GPS, GLONASS, etc.)
GPS
*Via Connected Smartphone
Monitor
Display Type
Articulating 3" Touchscreen LCD
Resolution
1,620,000 Dot
Viewfinder
Type
Electronic (OLED)
Resolution
2,360,000 Dot
Eye Point
27 mm
Coverage
100%
Magnification
Approx. 1.23x
Diopter Adjustment
-4 to +2
Focus
Focus Type
Auto and Manual Focus
Focus Mode
Continuous-Servo AF, Manual Focus, Single-Servo AF
Autofocus Points
Phase Detection: 1053
Autofocus Sensitivity
-5.5 to +19 EV
Flash
Built-In Flash/Light
No
Flash Modes
Fill In, Flash On, Manual, Off, Slow Sync
Maximum Sync Speed
1/250 Second
Flash Compensation
-3 to +3 EV (1/3, 1/2, 1 EV Steps)
Dedicated Flash System
TTL
Shoe Mount
1x Hot Shoe
Non-Shoe Flash Connection
No
General
Battery
1x BLX-1 Rechargeable Lithium-Ion (Included)
Tripod Mount
1x 1/4"-20 Female
Operating Conditions
14 to 104°F / -10 to 40°C at 30 to 90% Humidity
Storage Conditions
-4 to 140°F / -20 to 60°C at 10 to 90% Humidity
Materials
Magnesium Alloy
Dimensions (W x H x D)
5.5 x 3.5 x 1.8" / 139.3 x 88.9 x 45.8 mm
Weight
0.9 lb / 413 g (Body Only)
1.1 lb / 496 g (With Battery)
Packaging Info
Package Weight
2.615 lb
Box Dimensions (LxWxH)
7.6 x 7.4 x 5.7"

OM SYSTEM OM-3 ASTRO Reviews

A compelling option for the OM-3 but not "right" for me. Still the only factory astro-modified camera with IBIS and robust computational photography.

By Alan
Rated 4 out of 5
Date: 2026-05-29

The OM-3 Astro does have several features that aren't found in the standard OM-3 beyond the Ha sensitivity. Unique OM-3 Astro strengths 1) On the standard OM-3 when you turn on handheld high res shot, it takes 8 images and does not allow you to turn on noise reduction. On the OM-3 Astro, it really does take 12 images and also allows you to turn on noise reduction (dark frame). 2) The OM-3 Astro seems more sensitive to light. It seemed as if my exposure was consistently a little bit brighter on the OM-3 Astro for the given settings beyond what would be expected from just the increased Hydrogen-alpha sensitivity. 3) The presets really do look great. They're not directly translatable to the OM-3 standard because it's been fine tuned for the Hydrogen-alpha sensor. 4) The 60 second maximum shutter isn't as big of a problem because with handheld high res, that's really integrating 12 minutes per shot. OM-3 Astro limitations. - OM System's website says: "When Handheld High Res Shot is activated with the camera mounted on a tripod or equatorial mount, multiple exposures are combined into a 50MP image. Intelligent image alignment reduces noise and corrects star motion and tracking errors for crisp, high-resolution astrophotography." - While there is a custom 12+1=13 shot mode that was designed specifically for the OM-3 Astro, it doesn't seem to have any differences in the alignment algorithm. I thought it might be doing something similar to DeepSkyStacker but it's not. On a plain starfield, you might get errors of being unable to combine the images. With the 8mm fisheye, you'll get some trails as it's just aligning on the environment. It probably works best when you have the full Milky Way in field, or you are at a dark site where you get nebulosity in a single shot. I just tried it with the 8mm Fisheye and 50-200/2.8 PRO General OM-3 pros/cons IP53 is great. Handling is great with the SmallRig Arca Plate. Autofocus in the daytime as well as night are good. Only a single card slot. I've owned the EOS 60Da and EOS Ra. This is the nicest build quality of the three, has true IP53 weather protection (dew and condensation can affect your camera even if the skies are clear). The handheld high res shot on an equatorial mount would give you 50MP imaging along with internal dithering. I also think that the fixed pattern noise is cleaner on the OM-3. One minor nitpick is that the Canon astro cameras had a dedicated badge whereas the OM-3 Astro seems to be a sticker actually.

Astro Photography Camera

By Christopher
Rated 5 out of 5
Date: 2026-04-14

OM-3 Astro camera is light weight and easy to use. I have taken a few test shots and picture quality was fine. I am waiting for the accessory Body Mount Light Pollution Suppression Filter to be able to get full effect of Astro photography. When I receive accessory filter will do some Astro photography to put it through its paces. Have had very good quality pictures from OM System cameras. Have uploaded test photo unrelated to Astro photography.

See any errors on this page?

Can the Astro Version also take great everyday ...

Can the Astro Version also take great everyday pics, or are the astro filters always engaged, making the camera only for astro?
Asked by: Leslie
If you want to take daytime photos with a normal color range with a visible + H-Alpha camera you will have to either get a UV/IR cut filter also known as a hot mirror filter or do a custom daylight white balance with a gray card. However, that said straight out of the box without filter, or gray card the answer is a no .
Answered by: Uwe
Date published: 2026-02-18
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