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What's so special about Groups and Elements
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<blockquote data-quote="480sparky" data-source="post: 296130" data-attributes="member: 15805"><p>One thing that I've never figured out is what's so special about a lens' Groups and Elements? Why do manufacturers even bother to list them? What purpose does such a specification serve?</p><p></p><p>Suppose I'm shopping for a new 50mm f/0.45 lens. I've narrowed down my choices to the FlareMaster and the PurpleFringer. Both are 50/0.45s, they're the same size & weight, take the same size filters, etc. But the FlareMaster has 9 elements in 5 groups, and the PurpleFringer has 8 elements in 6 groups.</p><p></p><p>What would those numbers tell me, and why should I even care? I gotta know, or else I won't sleep tonight!</p></blockquote><p></p>
[QUOTE="480sparky, post: 296130, member: 15805"] One thing that I've never figured out is what's so special about a lens' Groups and Elements? Why do manufacturers even bother to list them? What purpose does such a specification serve? Suppose I'm shopping for a new 50mm f/0.45 lens. I've narrowed down my choices to the FlareMaster and the PurpleFringer. Both are 50/0.45s, they're the same size & weight, take the same size filters, etc. But the FlareMaster has 9 elements in 5 groups, and the PurpleFringer has 8 elements in 6 groups. What would those numbers tell me, and why should I even care? I gotta know, or else I won't sleep tonight! [/QUOTE]
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What's so special about Groups and Elements
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