Curious to hear comments on minimal focuser draw tube length for visual use: 1.5", 2.0", 2.5". My object here is in optimizing for visual use only (small secondary) and avoiding drawtube entering light path.
Clearly, the potential use of barlows, binoviewers bear on this. That having ben said break it down... with/without binviewers etc.
Joe
Clearly, the potential use of barlows, binoviewers bear on this. That having ben said break it down... with/without binviewers etc.
Joe
16" F5 "Front Collimating" mirror cell
