cameracomparison · 2-way
Sony A6700 vs Sony A7S III
Sony
A6700
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.
Key differences
-34% larger sensor
Finer pixels (3.76µm vs 8.4µm)
116% more resolution
Specifications
| Specification | Sony A6700 | Sony A7S III |
|---|---|---|
| Sensor | ||
| Type | dslr | dslr |
| Sensor | Sony APS-C BSI | Sony FF BSI |
| Sensor tech | CMOS | CMOS |
| Format | APS-C | Full frame |
| Sensor size | 23.5×15.6mm | 35.6×23.8mm |
| Diagonal | 28.2mm | 42.8mm |
| Pixel size | 3.76µm | 8.40µm |
| Resolution | 6192×4128 | 4240×2832 |
| Megapixels | 26.1MP | 12.1MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | — | — |
| Peak QE | — | — |
Advantages of Sony A6700
- Finer sampling at 3.76µm pixels
- Higher resolution (26.1MP vs 12.1MP)
Advantages of Sony A7S III
- Larger sensor (42.8mm vs 28.2mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
Best for — Sony A6700
- Balanced field for most refractors
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Best for — Sony A7S III
- Wide-field mosaics and full-frame telescopes
- Fast, low-noise deep-sky at short focal lengths
- One-shot color — quick results, less processing
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 A7S III — typical FOV & scale
- On 250mm refractor (wide)FOV: 8.16° × 5.45°Scale: 6.93"/px
- On 800mm SCT reducerFOV: 2.55° × 1.70°Scale: 2.17"/px
- On 2000mm SCT nativeFOV: 1.02° × 0.68°Scale: 0.87"/px
Sony A6700 — recommended user
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.
Sony A7S III — recommended user
A strong fit for photographers stepping into astro pairing with wide-field refractors.