Quote:
Originally Posted by cosmophoton
Interesting comparison, Bert!
Luiz
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Yes, here are some hard numbers.
RH200: FL 600mm F3 with PL16803 9 micron pixels
AP175: FL 1400mm F8 with PL29050 5.5 micron pixels
Both with Astrodon filters. Both images from southern hemisphere on top quality mounts. His sky would have been far darker.
The RH200 is about six times faster than the AP175 at F8.3. The equivalent sub exposure on the RH200 would be 20 sec for the 2 minute exposures of the AP175.
Bert