Here's one for the numbers and program-runners...I really love my D&G 6" f/15 achro...in all ways...and its permanently set up and all comfy it its own little roll-off house. Now, if I wanted to step up to an 8", and maintain the same level of "color correction" (yes, I follow all the achro/apo stuff)...I guess I should better say "color performance", what would be the equivalent f/ratio...and likely tube length? I've had several chances at 8" f/12, but timing/$$/experience wasn't right, I like the "kinda almost apo" performance I get (yea, I know a color bloom is in there), I liked the light quality vs quantity. What would I need to do to have both at an 8" level? :S 8O
No..there's no way I could ever fabricate a folded refractor.
FWIW I'm a purely old-skool visual observer, have absolutely NO, NEVER any inclination for photography or imaging, love doubles and the like.
Thanks for your calculations
No..there's no way I could ever fabricate a folded refractor.
FWIW I'm a purely old-skool visual observer, have absolutely NO, NEVER any inclination for photography or imaging, love doubles and the like.
Thanks for your calculations
8" f/12 D&G classic refractor
Astro-Physics 1200 DA equatorial mount
BlueStar Observatory (roll off) by Backyard Observatories of Lodi, Ohio
Previous telescopes A-Z...Astro-Physics to Zeiss