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Old 28-11-2009, 12:10 AM
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CometGuy
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CometGuy is offline
 
Join Date: Feb 2005
Location: Brisbane
Posts: 942
Rob,

I highly recommend the hyperstar. The obstruction by area of the QHY8 is ~25% so its not a big penalty.

I am using a C8 hyperstar with a QHY9 which has slightly more obstruction again but I'm very impressed. Attached is a single unguided 60 second exposure of the horsehead nebula.

Pros - Inexpensive, very fast, excellent edge-edge sharpness. Fantastic value for money.

Cons - Bright stars cast funky reflections. Also some might not like the diffraction spike caused by the cabling.

Terry
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Last edited by CometGuy; 28-11-2009 at 06:26 AM. Reason: Horsehead Unspun - must have been late when I posted!
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