My eyepieces are made from the waste product of exploding stars.
10XTi 102XLT ST80A(2" Focuser); President, Eypieces Anonymous, Denver Chapter (Hello, I'm an eyepiece junky, what's your excuse?)
DAS Dark Site
Quote:Yea Eddgie that is so true. Most scope like all thing do there best in the right setting. You should not expect your scope to perform at its best in poor setting then blame the optic for the poor images you see.
Quote: It's a rare night that I'm not looking through heat waves rising from the rooftops when I'm trying to view planets. This limits my planetary viewing to the 150x-200x range most nights. Fortunately planets aren't my thing so I can live with it.Having said that, even in those conditions the difference between my stock mirror in my XT10 and the Zambuto mirror I replaced it with was quite obvious.
Quote:I've always said the best piece of astronomy equipment you can buy is the "gas filter". NOTHING enhances a scopes performance like dark skies.......
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 .
Quote: I believe Eddgie when he says most observers couldn't tell the difference in focus between a good mirror and a great one on most nights. Maybe my stock mirror was just ok. I just know it didn't take perfect viewing conditions to tell the difference in my case.
Quote:Sadly, the Orion mirrors apparently have in the past varied quite a bit in quality. I read a review here on CN maybe last year where someone had a new Go-To dob and when tested, the evaluation showed up maybe a 3rd of a wave of SA. It sounded to me like the individual did know how to do the test for SA properly, so I have to take that as a valid asessment. Later, I think someone else tested it and concurred that the mirror was well under the "Good" catagory.
David W. Knisely . . . . . . "If you aren't having fun in this hobby, you aren't doing it right." Hyde Memorial Observatory http://www.hydeobservatory.info Prairie Astronomy Club http://www.prairieastronomyclub.org
Quote:Yes, that is the test I remember. And that is what I was saying.. I think Orion's quality does indeed vary, and someone earlier said that they did not think that their Orion did as well as a similar sized scope. My point there had been that between a good scope and an excellent scope, there is not much difference in performance (to your own point that "Diffraction limited" is the minimum quality level one sould allow), and it is likely that the other poster simply had a telescope with less than "Good" optics.Do you still have the scope? How is it doing now that the mirror has been re-figured?That is why if I get one of these (and I do want a Go-To dob), I will budget for a mirror job.
... and still the best wife I could wish for!
Friends call me Duane. Compustar C14, Leo Henzl's Custom C8, 6" Refractor Adv. GT mount, 6" F5 Omni XLT Newt., LXD-75 F4 Imaging SN8, Meade 8" F6 Newtonian, EX Dynamax DX6, RV-6 ETX-90 Astro, Meade 2045 4" SCT, B&L 4000 Vixen/Celestron 80mm F11 JC Penny 60mm AZ/ALT Refractor Binos 25x100