Ritchey-Chrétien 250mm F/8
Clear aperture – 250 mm;
Focal length – 2000 mm;
Primary substrate – Supremax33/Suprax; Quartz (special order); Zerodur (special order);
Secondary substrate – Quartz;
Primary mirror cage – Carbon Fiber;
Truss tubes – Carbon Fiber.
700 (L) x 330 (l) x 330 (h) mm (might differ slightly, depending on extra items chosen);
Weight – 12.5 kg;
Back-focus from end of back plate ~ 220 mm;
Connection thread on the back plate adapter: M117x1 – male.
Prices and configurations will be announced soon!