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Message: <blockquote data-quote="Patudo" data-source="post: 4051847" data-attributes="member: 139299">BF member garymh might be able to track down the year of manufacture of your #901905.  It might well be that in addition to the better optical performance Mr van Ginkel speaks of, your 7x35 was also late enough to receive multi-coated lenses (introduced by Zeiss c.1980; presumably Leitz would have been there or thereabouts).  I regret that the great Leitz porros were all discontinued long before the advent of multi-coating - few things would please me more, at least with regard to binoculars, than to have my Binuxits coated to Noctivid sophistication... The 7x42 Dialyt, P model, was one of the binoculars I took with me to compare side by side with the 7x35 "Retrovid" (<a href="https://www.birdforum.net/showpost.php?p=3951653&postcount=474" target="_blank">my impressions noted here</a>) and I also thought the two were very close, in sharpness and also (somewhat to my surprise) in brightness, although no doubt in really marginal conditions the 7x42 would win out.  I've always admired the stylish lines of the Leitz Trinovid series, and when the Retrovids were in hand their compactness and how effortlessly they pointed truly delighted me.  Although I'm not sure whether how well the Retrovids will work out as a business decision, I can absolutely see the appeal of this old classic, and furthermore, how designs like this were able to supplant porros in all but a few markets.  Frank L expressed it beautifully when he said:  "Although the non-phase coated Trinovids did not optically match the superb Porro I binoculars they replaced, they were remarkably light-weight and compact and were a pleasure to hold with a streamlined gracefulness to their appearance which made them one of the most ergonomically and visually pleasing binoculars ever made and heralded the demise of Porro prism binoculars to the overwhelming popularity of roof prism models (even though Porro’s are an optically more efficient and less costly design than roofs)."  Regards,Patudo</blockquote>

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