Quote:
|
Originally Posted by Lester
Loads of detail there Graeme.
I think this C11 should out perform the 9.25s.
|
I don't believe the C11 necessarilly will outperform a 9.25. For one, the C11 is much more difficult to collimate well, and it also suffers from a much greater shift in collimation when one crosses over the meridian. The C11 will be better in great seeing (4-5 days a year?) if it is collimated with extreme care. I find it also useful to collimate my C11 at roughly the same elevation as the planet one is imaging, using the red filter in my filter wheel, at very hig mag.
But 90% of the time I would opt for the 9.25.
Glenn Jolly
Arizona, USA