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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3474061" data-attributes="member: 92780">Vespo, that's in the ballpark - many of the big guns (50-54-56mm) fall in the ~190 - 210mm range for physical length. This is where the beauty of CFRP comes in - extra length doesn't come at a deleterious weight penalty - it's largely just inert gas in a very lightweight tube. Top grade Synthetic fluorite (as used by everybody bar Canon - who grow their own real crystals) has practically the same performance but is much easier and more economical to work. It is lighter than lesser grades too. In a 50mm SF, Ultra-FL and HT glass would be de rigueur .....  :king:Such a Vunderbin could be made at 850grams or less - and I agree, that's probably as much as you would want to carry (actually, it's probably more, but I think the satisfaction of having such a high performing 50mm bin would make it psychologically seem lighter! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />Much the same as in the photographic world where the big CaNikon duopoly neatly segments categories and conducts development at a glacial pace, the Alpha big dawgs of binoworld also stifle innovation (within the confines of non-digital classical troglodyte optics) to protect established segments and markets.  Maven is one company (Kamakura designed and manufactured) with the vision to upset the apple cart -- the only downfall here is too much weight in their products (I wonder how much longer dennis's biceps will continue to hold up <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />   :cat:The opportunity for a game changing 50mm SF is there --- Is Zeiss "bold" enough to make it? , or will it futilely try and protect its outdated legacy designs, and cede market share to Swarovski, content in the trickle of income coming from it's Schott glass subsidiary ...... :h?:</blockquote>

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