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Lenses
Telephoto
Tamron Vs. Sigma Vs. Camera
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<blockquote data-quote="Spottydumplings" data-source="post: 469776" data-attributes="member: 39844"><p>One thing to remember with this "rule" when using a crop sensor camera is that you should use the effective focal length of the lens, not the marked length.</p></blockquote><p></p>
[QUOTE="Spottydumplings, post: 469776, member: 39844"] One thing to remember with this "rule" when using a crop sensor camera is that you should use the effective focal length of the lens, not the marked length. [/QUOTE]
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Tamron Vs. Sigma Vs. Camera
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