cameracomparison · 2-way
Sony A7 III vs Sony A6700
Sony
A6700
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.
Key differences
52% larger sensor
Larger pixels (5.91µm vs 3.76µm)
-7% more resolution
Specifications
| Specification | Sony A7 III | Sony A6700 |
|---|---|---|
| Sensor | ||
| Type | dslr | dslr |
| Sensor | Sony FF BSI | Sony APS-C BSI |
| Sensor tech | CMOS | CMOS |
| Format | Full frame | APS-C |
| Sensor size | 35.6×23.8mm | 23.5×15.6mm |
| Diagonal | 42.8mm | 28.2mm |
| Pixel size | 5.91µm | 3.76µm |
| Resolution | 6000×4000 | 6192×4128 |
| Megapixels | 24.2MP | 26.1MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | — | — |
| Peak QE | — | — |
Advantages of Sony A7 III
- Larger sensor (42.8mm vs 28.2mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
Advantages of Sony A6700
- Finer sampling at 3.76µm pixels
Best for — Sony A7 III
- Wide-field mosaics and full-frame telescopes
- Fast, low-noise deep-sky at short focal lengths
- One-shot color — quick results, less processing
Best for — Sony A6700
- Balanced field for most refractors
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Sony A7 III — typical FOV & scale
- On 250mm refractor (wide)FOV: 8.16° × 5.45°Scale: 4.88"/px
- On 800mm SCT reducerFOV: 2.55° × 1.70°Scale: 1.52"/px
- On 2000mm SCT nativeFOV: 1.02° × 0.68°Scale: 0.61"/px
Sony A6700 — typical FOV & scale
- On 250mm refractor (wide)FOV: 5.39° × 3.58°Scale: 3.10"/px
- On 800mm SCT reducerFOV: 1.68° × 1.12°Scale: 0.97"/px
- On 2000mm SCT nativeFOV: 0.67° × 0.45°Scale: 0.39"/px
Sony A7 III — recommended user
A strong fit for photographers stepping into astro pairing with wide-field refractors.
Sony A6700 — recommended user
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.