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Message: <blockquote data-quote="etc" data-source="post: 3700742" data-attributes="member: 51377">Interesting points you make.I had a similar problem with Swaro EL. The ER was just right. But the eyecups were not long enough. I had to install eyecups from a 8x50 SLC to get the proper ER and avoid blackouts. This is not something you do on an alpha binocular.The deal breaker for me, is that  incredibly, NV and all Leica models *still* has the same diopter at infinity value of only -4 Diopters. Meaning if you are -5, you cannot use the device without corrective optical devices such as eyeglasses or contact lenses. They haven't changed since the 1990's Trinovid days. Seems under the hood, it inherits some of the same design. Instead of a complete redesign.How do I know? Leica told me. It's -4, officially. Lots of people have -5 through -8D.  I don't use them with glasses, so they are out for this very reason. This is as  important than ER or FOV (IMO).I can use Zeiss/Swarovski without any optical correction as their focus past infinity easily rolls over to -6D. This is too sad because IMO Leica has the top spot among alphas optically. But then I haven't seen the latest-greatest Zeiss SF, maybe it's no longer the case.</blockquote>