OM System
OM System OM-1
$2199
Released 2022-03
Best Mirrorless Cameras · head-to-head
OM System OM-1 vs Sigma BF
A sourced, side-by-side comparison. Sigma BF is cheaper at $1999. Every spec and price links to its source.
Sigma
Sigma BF
$1999Cheaper
Released 2025-04
Which is better: the OM System OM-1 or Sigma BF?
They split the 2 specs we compare evenly. The Sigma BF is the cheaper at $1999.
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Key specs, head to head
The numbers that decide it, drawn to scale — longer bar wins, the accent bar is the stronger figure.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | OM System OM-1 | Sigma BF |
|---|---|---|
| US price | $2199 | $1999 |
| Brand | OM System | Sigma |
| Released | 2022-03 | 2025-04 |
| Sensor format | Micro Four Thirds | Full-frame (BSI CMOS) |
| Megapixels | 20.4 | 24.6 |
| Max video | 4K@60p | 6K30p |
| Ibis | Yes | No |
| Mount | Micro Four Thirds | L-Mount |
| Continuous (fps) | 50 | 8 |
| Weight (g) | 599 | 446 |
| Release | 2022-03 | 2025-04 |
Sources — OM System OM-1: explore.omsystem.com (verified 2026-06-15). Sigma BF: newsfilecorp.com (verified 2026-08-26).
What's the difference between the OM System OM-1 and Sigma BF?
Where the two actually differ on the specs we track (7 of 7). Matching specs are omitted.
- Sensor format: OM System OM-1 Micro Four Thirds vs Sigma BF Full-frame (BSI CMOS)
- Megapixels: OM System OM-1 20.4 vs Sigma BF 24.6
- Max video: OM System OM-1 4K@60p vs Sigma BF 6K30p
- Ibis: OM System OM-1 true vs Sigma BF No
- Mount: OM System OM-1 Micro Four Thirds vs Sigma BF L-Mount
- Continuous (fps): OM System OM-1 50 vs Sigma BF 8
- Weight (g): OM System OM-1 599 vs Sigma BF 446
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
OM System OM-1
Both whitelisted testers rate the OM-1 a strong, rugged Micro Four Thirds flagship: RTINGS calls it a very well-built, weather-sealed body with excellent ergonomics, an incredibly quick electronic-shutter burst, and one of the best IBIS systems; DPReview lab-tested 50 fps AF, 1,053 cross-type AF points and gave it a Gold Award. Main flaw: buffer clears slowly. (2 sourced reviews, 2 lab-tested.)
Praised: Class-leading in-body image stabilization; Rugged, weather-sealed, well-built body with excellent ergonomics; Very fast electronic-shutter burst shooting with strong AF/subject detection.
Flagged: Large photo buffer takes a very long time to empty once full; Smaller sensor still trails larger formats on absolute image quality.
Sigma BF
No sourced tester review yet.