Telecentricity with 2″ outer diameter and T2 thread on both sides ;
Aplanatic, with 4x focal length extension and free of
Field of view curvature – provides f/30 on telescopes with f/7.5 ;
Specially calculated and manufactured for the H-alpha wavelength, with
highest Strehl value (definition brightness at 656.3 nm)
CHF 399.00
