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Message: <blockquote data-quote="FrankD" data-source="post: 1406491" data-attributes="member: 18544">Well, the eyepiece arrived today.It was not what I expected.Optically they perform quite well. The apparent field of view is noticeably narrower than the Swan though it is just as bright and maybe a tad sharper. Edge sharpness seems to be very good but I pick up noticeable color fringing around the outer edge of the image.The physical design is what caught me off guard. Judging by the picture on the website I thought the physical size of the eyepiece was going to be closer to the Pentax XW with a similar twist/slide eyecup design. Neither is the case. This unit is actually a bit narrower than the Swan (light path) with a dual (unique) locking eyecup and inset adjustment collar (for lack of a better term). I will take some pics of it tomorrow and post it.</blockquote>