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<blockquote data-quote="480sparky" data-source="post: 248229" data-attributes="member: 15805">In order to project the same image onto the smaller DX sensor as what an FX sensor would 'see', one would need to change the focal length of the lens in order to achieve the desired result.Don't use focal length to compare the two lenses.... use the Field of View spec instead.&nbsp; Or just use the 1.5x crop factor math instead.Take a look at the specs for your cell phone camera.&nbsp; Chances are, it's around 4mm, and it's due to the very small sensor inside.&nbsp; Put an actual 50mm lens on it and most people won't be able to hold it still enough to get an image without blurring.A point-n-shoot camera has a slightly larger sensor, so an 8mm lens would be the same as a 50mm on an FX body.At the other end of the scale... medium format.&nbsp; 50mm is a wide-angle on them.&nbsp; 4x5 view camera? 50mm is an wide-angle. Pull out an 8x10 view, and 50mm is incredibly wide.</blockquote>

[QUOTE="480sparky, post: 248229, member: 15805"] In order to project the same image onto the smaller DX sensor as what an FX sensor would 'see', one would need to change the focal length of the lens in order to achieve the desired result. Don't use focal length to compare the two lenses.... use the Field of View spec instead. Or just use the 1.5x crop factor math instead. Take a look at the specs for your cell phone camera. Chances are, it's around 4mm, and it's due to the very small sensor inside. Put an actual 50mm lens on it and most people won't be able to hold it still enough to get an image without blurring. A point-n-shoot camera has a slightly larger sensor, so an 8mm lens would be the same as a 50mm on an FX body. At the other end of the scale... medium format. 50mm is a wide-angle on them. 4x5 view camera? 50mm is an wide-angle. Pull out an 8x10 view, and 50mm is incredibly wide. [/QUOTE]

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