# OM System OM-1 vs Sigma BF: specs and price compared

A sourced, side-by-side comparison of the OM System OM-1 (OM System) and Sigma BF (Sigma) among mirrorless cameras. Sigma BF is the cheaper of the two at $1999.

## Side by side

| 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 |

## Key differences

- 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 Yes 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

**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.)

## Sources

- OM System OM-1: https://explore.omsystem.com/us/en/om-1 (explore.omsystem.com, verified 2026-06-15)
- Sigma BF: https://www.newsfilecorp.com/release/242056/Introducing-the-Radically-Simple-Sigma-BF-Camera (newsfilecorp.com, verified 2026-08-26)

Canonical: https://frontdeskreview.com/gear/mirrorless-cameras/om-system-om-1-vs-sigma-bf/
Cite: Per The Front Desk Review, OM System OM-1 ($2199) vs Sigma BF ($1999) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/mirrorless-cameras/om-system-om-1-vs-sigma-bf/
License: CC BY 4.0.