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Yeah, I would prefer a slightly larger FOV (1.5 arcsec/pixel would be good) but this is with the F/6.3 reducer, using the F/3.3 reducer I have never had success: I always have problems with extremely un-flat FOV, distorted stars, etc. I think because of the long image train but not really sure.
So I've stuck with the F/6.3 which gives me nice flat images and nice round stars, trade-off being 0.88 arcsec/pixel.
I'm often surprised by the image quality too (how good it ends up considering all), so aren't too unhappy with the situation. But yes, small FOV, which means I need lots of stars to have anything to match against.
Roger.
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