I want a decent used refractor for white light and h-alpha solar observation. I don't need anything special, I'm just wondering what the best aperture and f/ratio would be? I like the idea of a 80-100mm @ f/10-15 that I could use for double stars and planets at night but maybe a widefield would be better like a 60-70mm f/5-8. Any thoughts?
Refractor for Solar Observation
Started by Larry N, 03/09/2004 12:28AM
Posted 03/09/2004 12:28AM
Opening Post
Posted 03/09/2004 06:22AM
#1
A high f/ratio is more desirable for most H-alpha filters. Given that you also want to use the scope for binary star and planetary observation a 100 to 102mm f/11 or f/12 achromat would be your best choice.
Dave Mitsky
Dave Mitsky
Chance favors the prepared mind.
De gustibus non est disputandum.
Funding Member
