Re: [APML] Images from Sunglow

[Jerry Lodriguss <jml@astropix.com>]

>The light from those two stars just happened to correspond to a thin line 
>obstruction. Very simple and not at all weird. It can happen somewhere 
>down the tube before focus or far away from the scope. If the line is 
>right at the lens, then all stars will have it. If it is some distance 
>from the lens, front or back, then only some will have it. If it is right 
>at the focal plane then only one star will have it, if it happens to be 
>exactly where the obstruction is. Simple geometry.


Maybe it was something like a spider thread in the tube?


Jerry

Astronomical photography: http://www.astropix.com




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