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<blockquote data-quote="Dave_W" data-source="post: 287439" data-attributes="member: 9521"><p>Focal length does not change, so an 18-140 remains an 18-140. And a 24.1 MP image coming from a D7100 is a 24.1 MP image. No math needed. </p><p></p><p>DX is merely a smaller sensor so it only captures the middle portion (if you will) of the light coming through the lens compared to a full frame (FX) sensor. Because of this it gives an "apparent" focal length equal to 1.5 that of an FX but in reality it's just an image that's cropped smaller.</p></blockquote><p></p>
[QUOTE="Dave_W, post: 287439, member: 9521"] Focal length does not change, so an 18-140 remains an 18-140. And a 24.1 MP image coming from a D7100 is a 24.1 MP image. No math needed. DX is merely a smaller sensor so it only captures the middle portion (if you will) of the light coming through the lens compared to a full frame (FX) sensor. Because of this it gives an "apparent" focal length equal to 1.5 that of an FX but in reality it's just an image that's cropped smaller. [/QUOTE]
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