Quote:
Originally Posted by RyanJones
Hi Michael,
Good to see you taking advantage of any chance you get even if it has to be under some light polluted skies.
How are you mounting the 500mm tamaron ? It looks like you’re getting a little bit of movement there. Rho oph looks good. I’ve wanted to do this one for a while but I’ve never got around to it.
Well done
Ryan
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Thanks Ryan, yeah the stars are a bit wonky on the one shot with the mirror lens. Not sure whether it was holding focus. They're a bit temperamental and nailing the focus is tricky. I don't think the camera and lens were moving in the saddle as I was using a short dovetail bar to mount the camera on and it was locked in pretty tight. Probably more of a lens aberration inherent with these type of lenses. I'll also check my subs, there may have been a few rogue ones with trailing I didn't discard.
Quote:
Originally Posted by multiweb
That looks like a really nice lens. 
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The 135mm is an old Pentax f3.5 which is sharp but I have to stop it down to about f8 to eliminate some of the CA. The lens coatings may not be as efficient as they were when the lens was new. It's about 35 yrs old.