So high end Canon lenses are white. This is to reduce heat, correct? If so why is this something that only appears in really high end Canon lenses. I wouldn't think that painting a lens white increases production costs in any measurable way, why don't all lenses (and maybe by extension DSLR bodies) come in white, or at least have the option of buying them in some off-white color?
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Why is the front element of a telephoto lens larger than a wide angle lens?
A wide angle lens has a wide angle of view, therefore it would make sense that the front of the lens would also be wide. A telephoto lens ha...
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