Hello, I'm looking for an Apo refractor to use with a Nexstar 6/8 SE mount for solar observing with a Quark and for night time use. This refractor will be operating at F/30 since the Quark has a built in 4.2 Telecentric barlow for solar viewing. I also be binoviewing with it at least half the time.
I'm trying to understand the difference between these 4. Which one would you guys suggest?
1) Astro-Tech AT115EDT f/7 ED Triplet Refractor 13lbs/27.5" long without the dew shield
2) EXPLORE SCIENTIFIC CF 102MM F/7 TRIPLET 7lbs/23.75"
3) EXPLORE SCIENTIFIC 102MM F/7 ESSENTIAL SERIES APO TRIPLET 12lbs/23.75"
4) LUNT ENGINEERING 102MM F/7 ED DOUBLET (Supposedly the length and weight is top secret info, can't be found anywhere..)
I will very rarely be doing any astrophotgraphy..I'm confused about all these glass terms though, ED, CF, etc...Doublets have ED glass too now?
Thanks refractor heads Ha, I never thought I'd get a refractor, but here I am! I've only used dobsons and sct's to date and a minor experiment with an AT72 which didn't impress me much, but that was under very light polluted conditions and 2 quick tryouts. Maybe for solar or at a dark site and a bit more aperture things will look better.
Edited by Procyon, 11 January 2017 - 04:52 PM.