How To Choose Between Them
Compare the winners above against your own priorities. A lead in one category only matters if you use it.
Camera Comparison
Sony
Sony a7 III vs Sigma BF
Short AnswerThe Sony a7 III and Sigma BF split the spec sheet evenly, so the right pick depends on what you shoot.
By Jennifer K. Telfer · Updated · 1 Min Read
VS
Winner By Photographic Discipline
ResolutionSigma BF
Continuous ShootingSony a7 III
Battery LifeSony a7 III
WeightSigma BF
Launch PriceTie
Key Technical Performance Deltas
Resolution (MP)
A24.2
B24.6
Electronic Burst (fps)
A10
B8
Battery (Shots)
A710
B260
Weight (g, Lower Is Lighter)
A650
B446
Form Factor
126.9 × 95.6 × 73.7 mm
130.1 × 72.8 × 36.8 mm
Reasons To Choose Each
Choose Sony a7 III If…
- Higher continuous shooting (10 fps vs 8 fps)
- Higher battery life (710 shots vs 260 shots)
Choose Sigma BF If…
- Higher resolution (24.6 MP vs 24.2 MP)
- Lighter body (446 g vs 650 g)
Comprehensive Specification Table
| Spec | Sony a7 III | Sigma BF |
|---|---|---|
| Sensor | ||
| Format | Full Frame | Full Frame |
| Megapixels | 24.2 MP | 24.6 MP |
| Sensor Type | BSI CMOS | CMOS |
| Max Native ISO | 51200 | 102400 |
| Stabilization | 5 Stops | — |
| Autofocus | ||
| AF Points | 693 | — |
| Low-Light AF | -3 EV | -5 EV |
| Speed | ||
| Mechanical Burst | 10 fps | — |
| Electronic Burst | 10 fps | 8 fps |
| Fastest Mechanical Shutter | 1/8000 | — |
| Fastest Electronic Shutter | — | 1/25600 |
| Viewfinder & Screen | ||
| Viewfinder | EVF | None |
| EVF Resolution | 2.36M | — |
| LCD Size | 3" | 3.15" |
| LCD Type | Tilting | Fixed |
| Video | ||
| Best Video | 4K 30p | 6K 30p |
| Internal Color | 8-bit 4:2:0 | — |
| Log Profile | S-Log3 | L-Log |
| Body | ||
| Weight | 650 g | 446 g |
| Card Slots | 2 | 0 |
| Battery (CIPA) | 710 Shots | 260 Shots |
| Weather Sealed | Yes | Yes |
| Launch Price | 1999 | 1999 |
Amber marks the stronger value. Figures are manufacturer specifications.