Officina Stellare Veloce RH250 f5.6 athermal

Officina Stellare Veloce RH 250 (Riccardi-Honders) athermal astrograph offers a longer but still fast f/5,6 focal ratio (with 1400mm focal length) with a design that creates high definition over a wide and flat focal plane. Its design allows a corrected field all over the large 55 mm diameter so it's perfect also for the largest camera sensors, like 36x36 mm (51 mm diagonal).