Re: stalks vs spiders for secondary mirrors
Clay Spence x3039 (cds@peanut.sarnoff.com)
Wed, 19 Jul 1995 09:57:36 +0500
Alexander Yascovich <yas@kisa.iki.rssi.ru> wrote:
> ...for astrophatograhy you need shorter f/ratio while for
> observing of planets you should have longer f/ratio. Keeping in mind a
> portability I guess your choose should be between f/4-f/5.
I don't have the original message, but isn't a longer f/ratio is better
for photographing planets, too?
Clay Spence
cspence@sarnoff.com