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35mm -> 70-210mm lens
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<blockquote data-quote="BackdoorArts" data-source="post: 232304" data-attributes="member: 9240"><p>Your salesman has the crop factor backwards. FX and 35mm are roughly the same (FX sensor is actually a 36mm equivalent, but it's not enough of a difference to make you do math). DX is 1.5x smaller, so you get a boost in reach, not a reduction, so add 50% to both ends of your zoom making your 70-210mm equivalent to a 105-315mm.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 232304, member: 9240"] Your salesman has the crop factor backwards. FX and 35mm are roughly the same (FX sensor is actually a 36mm equivalent, but it's not enough of a difference to make you do math). DX is 1.5x smaller, so you get a boost in reach, not a reduction, so add 50% to both ends of your zoom making your 70-210mm equivalent to a 105-315mm. [/QUOTE]
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35mm -> 70-210mm lens
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