[astro744]

Originally Posted by stanlite

had some inside focus shots from last night think it looks squareish ... "Grady buys shot gun tells jimmy that he is taking the telescope for a walk 5mins later two shots ring out of the semi rural area."

http://i944.photobucket.com/albums/a...8/IMG_4222.jpg

Difficult to tell with mask on. Remove the mask and observe visually with an eyepiece of mod to high power. See http://www.willbell.com/TM/tm5.htm and look at the first set of images. Note these are for an unobstructed system. An obstructed system will have some more of the energy spread to the outer rings. You need to observe inside and outside focus to see if you have oval shaped diffractions rings and if the axis shifts 90 deg.