Update Feb 6th, 2025: OM-3 is available to preorder for $1,999(Body-only) at B&H Photo with an estimated shipment date of Feb 27.
OM System OM-3 MFT Camera
Here is a size comparison of the new OM System OM-3 vs the OM-1 Mark II vs the OM-5, followed by a specs and feature comparison (You can find the interactive size comparison of the OM-3, and compare with hundreds of other cameras on this page).
(click on the image for a larger version)
OM-3 vs OM-1 II vs OM-5 Size Comparison
I know some of how was hoping to get a Olympus PEN-F replacement but unfortunately the OM-3 is quiet a bit larger then the pen, here is another scaled size comparison (Read detailed comparison):
OM System Om-3 vs Olympus PEN-F Size Comparison
OM System OM-3 vs OM-1 II vs OM-5 Specs and Feature Comparison
| FEATURE and SPECS COMPARISON | |  |  |  |
| Model | OM System OM-3 | OM System OM-1 Mark II | OM System OM-5 |
| Sensor Resolution | 20.0 MP | 20.0 MP | 20.0 MP |
| Announced Date | 2025-02-06 | 2024-01-30 | 2022-10-26 |
| Camera Type | Pro Mirrorless | Pro Mirrorless | Advanced Mirrorless |
| Sensor Type | Stacked BSI Live MOS Sensor | Stacked BSI Live MOS Sensor | CMOS |
| Sensor Size | Four Thirds | Four Thirds | Four Thirds |
| Sensor Sensitivity | ISO 200 - 25600( expands to 80-102400) | ISO 200 - 25600( expands to 80-102400) | ISO 200 - 25600( expands to 64) |
| Lens Mount | Micro Four Thirds | Micro Four Thirds | Micro Four Thirds |
| Image Stabil. | Sensor-shift ( up to 7.5 stops) | Sensor-shift ( up to 8.5 stops) | Sensor-shift ( up to 7.5 stops) |
| Eye Tracking Focus | | | |
| Weight | 496g | 599g | 414g |
| Dimensions | 139 x 89 x 46mm | 135 x 92 x 73mm | 125 x 85 x 50mm |
| Weather Sealing | | | |
| Focus Points | 1053 | 1053 | 121 |
| Animal Eye Tracking | | | |
| Focus Stacking | | | |
| Focus Bracket | | | |
| Minimum Shutter | 60 sec | 60 sec | 60 sec |
| Maximum Shutter | 1/8000sec | 1/8000sec | 1/8000sec |
| Maximum Shutter Electronic | 1/32000 sec | 1/32000 sec | 1/32000 sec |
| Continuous Drive | 120.0fps | 120.0fps | 30.0fps |
| Max Video Reso | 4096 x 2160 | 4096 x 2160 | 4096 x 2160 |
| Video fps at Max | 60p, 50p, 30p, 25p, 24p | 60p, 50p, 30p, 25p, 24p | 24p |
| Video Formats | MPEG-4, H.264, H.265, HEVC | MPEG-4, H.264, H.265, HEVC | MPEG-4, H.264 |
| Storage Slot | 1 | 2 | 1 |
| UHS Support | UHS-II | UHS-II | UHS-II |
| Battery Life | 590 | 520 | 310 |
| Battery Model | BLX-1 | BLX-1 | BLS-50 |
| RAW Video | | | |
| Webcam | | | |
| Anti Flicker | | | |
| Microphone Port | | | |
| Headphone Port | | | |
| Wifi | | | |
| Weather Sealing | | | |
| Timelapse | | | |
| Screen Type | Fully articulated | Fully articulated | Fully articulated |
| LCD Size | 3.00" | 3.00" | 3.00" |
| Screen dots | 1620000 | 1620000 | 1040000 |
| Touch Screen | | | |
| Viewfinder | | | |
| Viewfinder Type | Electronic | Electronic | Electronic |
| Viewfinder Coverage | 100% | 100% | 100% |
| Viewfinder Magnification | 0.62x | 0.83x | 0.68x |
| Viewfinder Resolution | 2,360,000 | 5,760,000 | 2,360,000 |
| Selfie Friendly Screen | | | |
| High Resolution Mode | | | |
| AF Joystick | | | |
| Bluetooth | | | |
| Vehicle Tracking | | | |
| Live Composition | | | |
| Price | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo |
