cameracomparison · 2-way
Sony A7 III vs Sony A1
Key differences
Larger pixels (5.91µm vs 4.35µm)
-52% more resolution
Specifications
| Specification | Sony A7 III | Sony A1 |
|---|---|---|
| Sensor | ||
| Type | dslr | dslr |
| Sensor | Sony FF BSI | Sony FF stacked BSI |
| Sensor tech | CMOS | CMOS |
| Format | Full frame | Full frame |
| Sensor size | 35.6×23.8mm | 35.9×24.0mm |
| Diagonal | 42.8mm | 43.2mm |
| Pixel size | 5.91µm | 4.35µm |
| Resolution | 6000×4000 | 8640×5760 |
| Megapixels | 24.2MP | 50.1MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | — | — |
| Peak QE | — | — |
Advantages of Sony A7 III
- Larger pixels — better low-light per-pixel sensitivity
Advantages of Sony A1
- Finer sampling at 4.35µm pixels
- Higher resolution (50.1MP vs 24.2MP)
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 A1
- Wide-field mosaics and full-frame telescopes
- Fast, low-noise deep-sky at short 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 A1 — typical FOV & scale
- On 250mm refractor (wide)FOV: 8.23° × 5.50°Scale: 3.59"/px
- On 800mm SCT reducerFOV: 2.57° × 1.72°Scale: 1.12"/px
- On 2000mm SCT nativeFOV: 1.03° × 0.69°Scale: 0.45"/px
Sony A7 III — recommended user
A strong fit for photographers stepping into astro pairing with wide-field refractors.
Sony A1 — recommended user
A strong fit for photographers stepping into astro pairing with wide-field refractors.