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Message: <blockquote data-quote="mikenott" data-source="post: 1541829" data-attributes="member: 71182">Thanks for the interest, replies and possible solutions. Haven't tried them all out yet (and grateful for more), but just to answer some questions that came up....When I say "higher mags" I mean on the Swaro using the 25-60 zoom eyepiece, not on the P6000.I only zoom the P6000 to the point where vignetting just disappears, or even can still be seen very slightly. Not using digital zoom at all.The Nikon guy suggested turning the noise reduction and/or distortion control off. Whether that was based on a deep undertanding of polychromal optics within a proportional control feedback system ...... or just one last attempt to get me off the phone is not clear to me :smoke:As far as I am aware, the combo of Swaro DCA and Nikon E-21 adaptor is fine. I have a small converter ring that adds about 1-2mm to total depth. Does it make any difference where the DCA is clamped onto the Swaro zoom ring? I can move the DCA up and down about 15mm on the zoom ring.  I have always had it as low as possible to the body of the scope i.e. the distance between the Swaro eyepiece glass and the P6000 lens is minimised.Many Thanks,Michael.</blockquote>