Re: Do all Wide angle lenses distort stars that are off center frame?
What camera and lens are you using? A lot rides on the build quality and even then you could get one from a bad run.
I use the Tokina 11-16 AT-X II f/2.8 for my ultra wide on the crop sensor. At wide open it has no noticeable vignetting or coma. Stopping it down to f/3.2 is a fair trade off though.
Scopes:Celestron Fastar 8" OTA (Removed from NexStar 8SE), William Optics ZenithStar 71 Mount: iOptron IEQ45 GEM v2 FR's: Antares 6.3 Focal Reducer (SCT), William Optics 0.8 PFlat-6 (Refractor)
EP's: Plössl 6mm, 8mm, 13mm, 17mm, 25mm, 32mm, 2x Barlow PSU: Celestron Powertank 17Ah
Imaging: Canon EOS 650D (EOS Rebel T4i), Photoshop CS6 x64, DSS