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Message: <blockquote data-quote="OPTIC_NUT" data-source="post: 3279586" data-attributes="member: 121951">Extra-resolution images (HD, ED or just plain extra-resolution) don't cause the edge so much as they intensify it ans lash out at singlereceptors.   Before all that, most binoculars exceeded the eye's capability anyhow. An option:If you defocus slightly, by pushing the focus a tiny bit beyond (in the towrds-infinity direction), you will see the cutting edge break down,but the resolution will still be about at your acuity, and it won'tdazzle you (fry one receptor but not the neighbor). I say defocus towards the long side because the eye is relaxed.Defocusing towards the short distance side can cause eyestrain.  Anyway, that avoids dimming or yellowing from a filter.It does cast doubt on the value of the extra resolution and transmissionbut just in certain situations.  You can always use the extra edge whenlighting is better, like overcast skies.</blockquote>