ASI585MC Pro back focus
ZWO specify “Back focus distance 17.5mm (11mm ring included) / 6.5mm”. That is measured to the camera's own front face, with no adapters fitted.
- Back focus
- 6.5 mm
- Thread
- M42
- Sensor
- 11.136 × 6.264 mm
- Pixel size
- 2.9 µm
- Type
- Colour, cooled
Checked against the manufacturer’s documentation in September 2026.
Where to buy the ZWO ASI585MC Pro
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Telescopes
| Telescope | Back focus | Spacers | Sampling | Result |
|---|---|---|---|---|
| 103APO | 55.0 mm | 32.0 mm | 1.07″/px | Exact |
| 185APO | 55.0 mm | 32.0 mm | 0.58″/px | Exact |
| FRA400 | 55.0 mm | 32.0 mm | 2.14″/px | Exact |
| FRA500 | 55.0 mm | 32.0 mm | 1.71″/px | Exact |
| FRA600 | 55.0 mm | 32.0 mm | 1.42″/px | Exact |
| Evolux 62ED | 55.0 mm | 32.0 mm | 1.66″/px | Exact |
| Evolux 82ED | 55.0 mm | 32.0 mm | 1.25″/px | Exact |
| Evostar 100ED | 55.0 mm | 32.0 mm | 0.78″/px | Exact |
| Evostar 120ED | 55.0 mm | 32.0 mm | 0.78″/px | Exact |
| Evostar 80ED | 55.0 mm | 32.0 mm | 1.17″/px | Exact |
| Fluorostar 91 | 60.4 mm | 37.4 mm | 1.38″/px | Exact |
| Gran Turismo 71 | 64.1 mm | 41.1 mm | 1.78″/px | Exact |
| Gran Turismo 81 | 62.1 mm | 39.1 mm | 1.56″/px | Exact |
| Zenithstar 61 | 56.0 mm | 33.0 mm | 2.08″/px | Exact |
| Zenithstar 81 | 60.2 mm | 37.2 mm | 1.34″/px | Exact |