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Message: <blockquote data-quote="Gijs van Ginkel" data-source="post: 3654870" data-attributes="member: 82596">In post 39 I have described which considerations Leitz had when it developed the Leitz Trinovids made from 1963-1988. One of the arguments was that by using the interior focussing/diopter mechanism, the binoculars would not collect dust or water inside. That is also how it worked for me during years of fairly hard use of the 10x40B Leitz Dialyt and it never collected water or dust. So I do not quite understand the worries about the new ones, since they will certainly just as good or even better than the old ones. I just finished the investigation of  a number of old ones:  7x35B (1966, 1967, 1982) , 8x40B (1969) and 10x40B (1965 and 1977) made in different periods of time between 1965 and 1982 and they were all in good condition, no dust or water inside and some of them very heavily used. So, I would say: do not worry before you have used them a lot. There is a proverb in Dutch that says: de mens lijdt dikwijls het meest door het lijden dat hij vreest, doch dat nimmer op komt dagen. I am curious what Google translate will make of it.Gijs van Ginkel</blockquote>