camera
Sony
A7S III
Full frame · 4240×2832 · Color
Low-light full-frame mirrorless.
Best for
- Wide-field mosaics and full-frame telescopes
- Fast, low-noise deep-sky at short focal lengths
- One-shot color — quick results, less processing
Specifications
| Sensor | |
| Type | dslr |
| Sensor | Sony FF BSI |
| Sensor tech | CMOS |
| Format | Full frame |
| Sensor size | 35.6×23.8mm |
| Diagonal | 42.8mm |
| Pixel size | 8.40µm |
| Resolution | 4240×2832 |
| Megapixels | 12.1MP |
| Color | Yes |
| Cooling & performance | |
| Cooled | No |
| Full well | — |
| Peak QE | — |
Typical FOV & image scale
On 250mm refractor (wide)
FOV 8.16° × 5.45°
Scale 6.93″/px
On 800mm SCT reducer
FOV 2.55° × 1.70°
Scale 2.17″/px
On 2000mm SCT native
FOV 1.02° × 0.68°
Scale 0.87″/px
Typical targets
- Messier M42 — Orion NebulaEmission Nebula · 85′
- Messier M8 — Lagoon NebulaEmission Nebula · 90′
- Messier M24 — Sagittarius Star CloudOpen Cluster · 90′
- IC IC 5070 — Pelican NebulaEmission Nebula · 80′
- NGC NGC 2237 — Rosette NebulaEmission Nebula · 80′
- Messier M7 — Ptolemy's ClusterOpen Cluster · 80′
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