Quote:
Originally Posted by Bassnut
more blue would be nice  . |
Arrrrrggh!
Quote:
Originally Posted by Bassnut
Soo, how would you say the RHA stacks up against a pure RC, optically?.
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Thanks Fred. For starters they are awful to look though, big secondary that throws shadows from all but the shortest of eyepieces. It's a wide field astrograph and not much else.
Optically, the RC eats it for narrow field....much better res provided the seeing is OK (my RCOS is down at the moment...mirrors are out for a re-coat)
But in terms of field flatness and zero abberations across a 70mm field... the RHA is a good as it gets. I'd like to see a built in orthogonality adjuster, but otherwise it oozes quality that AP is famous for.
Edge stars are little needles (in fact I use the guide chip to focus!) and when they aren't, I know I haven't put the camera in place correctly.