Quote:
Originally Posted by Derek Klepp
Peter I will be interested in how your module goes.Mine has what seems like lots of internal dust bugs only evident once you crank up the mag and hence the need for flats at 3x or greater mag.
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I think you'll find it's your ccd's cover-slip.... not the filter...as I get he same when using small exit pupils......but to be sure..rotate the camera while looking at the image. The location of any motes will become obvious.