Unfortunately Saturn's opposition 2005 has been clouded out for me. 3 nights later I had the opportunaty to image Saturn in "almost opposition" constellation.
Seeing has been bad so this has been a challenge to defy bad conditions. Imaging at 1/25s with 5fps ( = real 200ms exposure time for the ToUcam) resulted in totally blurred frames. Finally 1/33s with 10fps ( = real 50ms exposure time) featured an exposure time short enough to freeze the seeing enough to display some details at the cost of 100% gain necessary for a usable exposure.
Seeing distorted the captured frames as far as stacking even few frames didn't result in a sharp ring. To obtain at least a usable image I stacked 400 frames twice, once registered to the left side of the rings and once to the right side and combined results in Photoshop
2005.15.01. - 23:57 UT
Seeing 1-2/10, Transp. 6-7/10
Vixen VMC200L on GM-8, Meade #140 2x barlow
ToUCam pro in optimized non-raw mode @352x288, 1/33s, 10fps
2x400 of 3375 frames stacked separately
Processing in Registax v3, Gradient quality estimation
Postprocessing Photoshop
2005.16.01. - 00:15UT
2x387 of 4039frames stacked separately
Good rawframe of AVI:
For comparison an image captured with 1/25s at 5fps (effective 200ms
exposure time per frame):
23:38UT, same conditions and equipment as above
668 frames stacked
Good rawframe of AVI:
