ROR Observatory Levenhuk 8" carbon fiber RC, Astro Physics CCDT67 Astro-Tech AT8IN w/Moonlite, Baader Mark III MPCC Levenhuk 80mm triplet, Astro Tech 0.8X reducer/flattener Celestron CGEM DX w/HyperTune STF-8300M SX 7 position 36mm CFW Astrodon 5nm H-alpha Little Piney Observatory
Quote:Ah... the downside of a big fast scope. I stopped trying to get round stars across the whole field with that scope after about three or four wasted nights. I attributed it to my cheaper astro-tech reducer. I've never had such headaches with a refractor
8" F4 Newtonian (Royce Mirror) SV 130 EDT APO SV 80/9D (Erstwhile guide scope) DSI RC10C (10" corrected Ritchie-Chretien) A-P 900 GTOCP2 QSI 683wsg-5 A whole bunch of other stuff...
Quote:Orlando, I thought you could even use 1.25" filters with the 8300 sensors above f/5 so you might be good with a 36mm filter.JJK, this looks great! I have been looking into the different cameras with the 8300 sensor. I had pretty much decided on the STF-8300 and going with the Astrodon 5nm filters. Maybe I should just bite the bullet and get the 3nm? I wonder how much of this (Alnitak) is the camera (FLI vs SBIG) and how much is the filter (Astrodon 3nm vs 5nm)?
Quote:A few nights ago I discovered that Altair Astro makes a 0.6X refractor reducer.. for a hundred bucks. How good that is.. I shudder to speculate.But Borg has a $1000 0.66X refractor reducer that would take my refractor down to f/4. Yes it's an expensive reducer but my Keller costs about that much.Now as to why I'm still fighting this scope.. there's no way to get an f/3 focal ratio under $5000 except with this Franken-scope. The only other options are the AGO or ASA newtonians, the Officine Stellare RH200, or the Takahashi Epsilon (or the Borg 125SD with the Super Reducer, or the Tak FSQ-106 with its own reducer). All of which are too rich for my blood...
Clear skies - Jim Crazy PNW imager !
A-P Mach1 on 12" concrete pier - ROR structure.
Tak FSQ85-EDX, Tak FS-128. Orion 8" f/3.9 w/MoonLite motorized - MPCC MkIII CCD:
SBIG 8300M/FW8, Astrodon 36mm LRGB, 5nm Ha, 3nm SII, OIII - Canon EOS 6D unmod SSI3, SSAG,
Skytools3pro, MaxImDLpro, PSCS5, PSPpro, TheSkyX, TheSky6, BYE, StarTools
Orion XX14g -for visual- diags, ep's, accy tubes, Binocs .
My PixInsight Tutorial
Pointer to Other Useful Threads of Mine
Quote:We are planning to do a comparison that will isolate the filters as the (nearly) only source of variation. We both have KAF-8300 cameras (his FLI, my Atik). His filters are much larger than mine (I think they are the 50mm round versions, where mine are Baader's 36mm filters). We'll compare results on a single scope and see what the images look like.
Quote:Quote:We are planning to do a comparison that will isolate the filters as the (nearly) only source of variation. We both have KAF-8300 cameras (his FLI, my Atik). His filters are much larger than mine (I think they are the 50mm round versions, where mine are Baader's 36mm filters). We'll compare results on a single scope and see what the images look like. I'd be very interested in seeing the results of this. Wish I could also find a 5nm vs 3nm Astrodon h-alpha comparison somewhere. I think the H-alpha will be the first filter I get after I buy my camera.