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Message: <blockquote data-quote="Kevin Purcell" data-source="post: 1461969" data-attributes="member: 68323">Arthur: What Kimmo doesn't make explicit is the 10x42 IS L uses ED glass. FL is Zeiss' trademark for bins that use a fluoride doped (i.e. ED) glass.Canon call it UD (such a proliferation of brandnames have sprouted from the original ED: FL UD, HD, etc, etc). Two elements per barrel ... one in the objective and one in the EP? That's what the L in the product name signifies -- like the L photographic lenses they make. It also explains what might seem odd initially that the pricing for the 10x42 IS L is often more than the bigger 15x50 IS or the 18x50 IS.So you can have your ED glass cake and eat the IS too <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />Kimmo: I see you wrote a review of the 10x42 IS L for Alula back in 2001 but it isn't online (never has been?). Is there a any chance of getting the copy of a the review text?</blockquote>