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Message: <blockquote data-quote="etc" data-source="post: 3700751" data-attributes="member: 51377">There is nothing wrong with significant ER, the issue is when the eyecup cannot raise high enough to accommodate the ER.I had precisely that situation with Swaro EL 8.5x.  The eyecups that came with it resulted in blackouts, while ER was right on the money. Had to use eyecups from a 8x50 SLC. They fit, kind of. Not perfectly (leaving a mm gap around the lenses) but they work. Hard to believe they had such an oversight on an expensive alpha model.Seems like the internal optics are more excellent on Swaro EL. Then it got handed off to another team that built that stupid eyecup cover contraption and the objective covers that slip off and the eyecups that don't raise enough..My next bino is Zeiss SF 8x42 2nd generation</blockquote>