iceman
26-02-2007, 06:14 AM
I finally managed to get the data needed to do a comparison.
I couldn't really do a comparison on Jupiter as even when they were they same angular size (35.1"), my 10" Jupiter images were taken with a ToUcam whereas the 12" Jupiter image was taken with a DMK21AF04 (with filter wheel etc acting as an extension).
But this comparison is with the same 5x powermate, DMK21AF04 + filterwheel, with the only difference being the tube - between my old 10" newt vs my new 12" newt. The diameter of Saturn in both cases is the same (20").
10" newt - f/5 - 1250mm FL
12" newt - f/5 - 1500mm FL
The extra focal length is of course magnified with the powermate + extension tube.
Both images taken at 15fps (1/15s exposure), with the OTA on an EQ6.
I love the extra image scale my 12" gives!
I couldn't really do a comparison on Jupiter as even when they were they same angular size (35.1"), my 10" Jupiter images were taken with a ToUcam whereas the 12" Jupiter image was taken with a DMK21AF04 (with filter wheel etc acting as an extension).
But this comparison is with the same 5x powermate, DMK21AF04 + filterwheel, with the only difference being the tube - between my old 10" newt vs my new 12" newt. The diameter of Saturn in both cases is the same (20").
10" newt - f/5 - 1250mm FL
12" newt - f/5 - 1500mm FL
The extra focal length is of course magnified with the powermate + extension tube.
Both images taken at 15fps (1/15s exposure), with the OTA on an EQ6.
I love the extra image scale my 12" gives!