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Message: <blockquote data-quote="BruceH" data-source="post: 3148375" data-attributes="member: 106398">Good point.  When I looked up the Nikon SE transmission figure in the Allbinos review, I tried to find out if it was the newer 550xxx series but the photos only showed the top side rather than the bottom with the serial number.  You post motivated me to dig through my notes and I found a note based on some of Brock's posts saying the 550xxx series came out in 2006/2007.  The Allbino review is dated 2011 so it is likely that the Allbino binoular had newer coatings.  If so, then Weck's Nikon SE would be at least 3% less transmission than his new Zeiss SF, and possibly more.  It would be great to know the first three digits of Weck's SE serial number.    It looks like I also omitted a major observation.  If the SE is a 8X32, then it only has a 4 mm exit pupil compared to the 5.2 mm exit pupil of the 8X42 Zeiss SF.  The larger exit pupil of the SF could also make a difference considering the poor winter light of Wisconsin.  Another good point.  That is something I have wondered about in the past when doing comparisons for brightness.  That might make for a good topic of discussion in a new thread.  Using some else's money is a good idea, especially if you are saving up for an SF.</blockquote>