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Message: <blockquote data-quote="Nixterdemus" data-source="post: 3660531" data-attributes="member: 96265">The best way for me to check collimation is to focus on a portion of tree/distinct feature 50-100 yds off fairly parrallel to the ground. Back up from the bins/push them slightly in front of eyes. W/o moving gaze lift the bins, so you are still have the view framed w/o the bins. Do this a few times back & forth slowly.If bad out of collimation I will see the image merge after lifting bins. If not that severe, yet too much I feel me eyes merging back to convergence when lifting the bins. Your eyes should feel no difference/strain when going from magnified to nothing w/properly collimated/focused bins.At my age if I feel nothing I'm close enough.As always, YMMV ...ETA: ETA: Certainly no intent to rain on Robert's parade as the Noctivid being an alpha is undue of any criticism/critique of a newly commisioned entry level Leica. As well the blackout is not the proper description. I see pieces of black as crescents, located according to tilt, because I cannot hold the bin steady enough w/o being able to rest them in me normal fashion. It is so annoying that I lose concentration. Only in that aspect does it black out my view. I'm right there at the edge/outside looking in. Actually, w/cups all the way in I still see the center half of view nice, round w/o appearing crescents. I suppose if there was one more click setting I would be good to go. Or if Leica, in their infinite wisdom, offered slightly longer cups.</blockquote>

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