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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3292843" data-attributes="member: 92780">Vespo, not sure where you sourced that , or with reference to what context, but the range of CFRP material properties is vast, rather like the growing list of different flavas of chips!  :eek!:You should check out the Young's Modulus, UTS, Specific Gravity, Thermal Expansion Coefficient, Porosity, etc, and then they must be applied in a Finite Element Stress Analysis for any given design to get the true picture - Hoop Stress will have just a big a bearing as Bending Moments, and Buckling Failure modes, Ductility /Brittleness /Hardness will all play their parts too .......... but I ain't givin' ya (nor Zeiss, nor Swarovski either! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> the fully skinny on any of that for free ........... :smoke:Suffice it to say that the right recipe of CFRP is the superior material, and once bino manufacturers decide to move on from the horse and buggy days we might at last get some value for money lightweight stronger bins  :cat:Chosun  :gh:</blockquote>