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Message: <blockquote data-quote="Pileatus" data-source="post: 431964" data-attributes="member: 9609">Ilkka,A good bin doesn't require a lot of focusing. Both my Leica 7X42 and Nikon SE 8X32 dial directly in to a near-perfect focus about 90% of the time and it's one of the MAJOR reasons I chose them. I sometimes tap the SE focus wheel to get THE PERFECT image and the Leica might require a nudge now and then to obtain the finest view.I remember reading about a study that concluded excessive fine focusing QUICKLY ruined an image because it strained the user's eyes. The recommendation was to focus, wait a moment for your eyes to adapt, apply a quick final adjustment, and then leave the focuser alone. If this method does not work 99% of the time, I argue the optics aren't high quality to begin with and no amount of focusing will satisfy.John</blockquote>