Quote:I agree, though think of it differently. Tilt of a spherical surface can be though of as decentering. The reason I down play this it that it's the only alignment issue theat's fairly easy to see and correct (with a laser colimator). This is also in contrast to an asphere, that is down right ugly... tilted or decentered :-)
- Stephen - www.zytratech.com - Gallery on Flickr Twitter Working on my 17" CDK and its Equatorial Mounting: Build Log on CN
Money can't buy happiness, but it sure makes living with misery a lot easier!
Quote:I was hoping I could assemble the secondary tonight but I had to rework a few threads that were a little too tight! Guess the complete mock-up will be finished tomorrow.
12 Skywatcher Collapsible Dobsonian (coming soon)
Celestron C102 HD " Carl"
Scope brand 60mmx 700mm " widger scope"
Celestron Comet catcher(orange tube)"Scott"
60mm Telescope Club
CPC1100, Hyperstar III, Canon T3 (Full Spectrum Mod)
POD XL3 w/PZT (Promethean Visions Observatory) / www.promethean-visions.com
My Astrobin --> Escher's Astrobin Feed
Meade 305 ƒ/10.4 LX200 • Royce 250 ƒ/19 Dall Kirkham • AstroTech 250 ƒ/8 RC • AstroTech 250 ƒ/4 "RFT" Newtonian • Meade 80 ƒ/6 ED APO • TEC 140 ƒ/7 APO • Orion 180 ƒ/15 Mak Cass ... Denkmeier II binoviewer - Nikon 8x60 binocular
Astronomical Files from Black Oak Observatory
SharpStar 65EDQ (same as AT65EDQ) 9.25" Homemade dobsonian with 1/13 wave self-made mirror. AT6RC/Celestron ASGT http://www.astrobin.com/users/tyblakesley/