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Odd shaped stars. Any suggestions what could be causing it.
First light for my Vixen VC200L last night and I'm not sure what's happening with the stars. Details:
Vixen with FR (vixen FR) = approx 1200mm FL
Canon 20D
Losmandy G11 (DD and PHD Guiding)
7/ISO800 @ 300sec
Frankly I'm absolutely chuffed at how well the mount autoguided at that length, but I'd be interested to know what is happening with the stars. The bright ones have a distinctive bulge at the top left, the medium stars are egg shaped as are the fainter ones
btw this is a full size crop of M7 from near the center
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