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Message: <blockquote data-quote="Neil" data-source="post: 1186421" data-attributes="member: 1568">I've got the Swarovski 20W eyepiece (thanks to my mate Roy ) so thought I would test it with the Canon A650 as I would like more reach than I'm getting with the Scopetronix Maxview eyepiece (11.5x ) .With the standard camera adapter you can't eliminate the vignetting.  So I used the 2x digital zoom feature (1.5x wasn't enough to completely eliminate vignetting ) which allows digital zoom throughout the range ( basically Cropping the centre ). A wide camera zoom using this feature - no vignetting. By adjusting the camera to eyepiece distance throughout the zoom range it's possible to keep vignetting out to full zoom.The first composite photo shows the result at wide camera zoom (7.4 mm) with the original on the left and the CS2 adjusted image on the right.  The second composite shows a blow up of the centre of an image taken at around 1/2 camera zoom on the A650 (with 2x digital zoom ) and benchmark Fuji f50fd crop of roughly the same size using optical zoom only.  As you would expect the F50 detail is better but not by as much as I expected.  Both images are as they came out of the camera, just cropped for size.I also tested the Nikon 8400,Canon G6 and Nikon P5100 as well.Neil.Hong Kong,China.April 2008</blockquote>