Reply to thread

Message

<blockquote data-quote="WayneF" data-source="post: 508840" data-attributes="member: 12496">Your first sentence answers the question in the second.&nbsp; That is all there is to it.If it is the SAME 50mm lens on both DX or FX, then it is of course the same lens, and it performs exactly the same on either camera - in every respect if all other conditions like subject distance remain the same.&nbsp; &nbsp;&nbsp; A 50mm lens made for DX might be &quot;optimized&quot; to have smaller diameter glass, which won't project as large an image, but it will be smaller and lighter and cheaper... than a 50mm lens for FX.&nbsp;&nbsp; But the crop factor effect is still the same for exactly the same lens on either camera.&nbsp;However, the smaller sensor &quot;crops&quot; the field of view from the lens (called cropping), so only the field of view changes ... The DX sensor sees a smaller view captured.&nbsp; The smaller sensor simply sees less of the lens image - and therefore the smaller image has to be enlarged more to view it at the same size as the larger FX image.&nbsp; This extra enlargement is the telephoto effect that makes us compare it to a 75mm view on FX.&nbsp;&nbsp; But the same 50mm lens is exactly the same lens on either body.<a href="http://www.scantips.com/lights/cropfactor.html" target="_blank">Camera Sensor Crop Factor and Equivalent Lens Focal Length</a></blockquote>

[QUOTE="WayneF, post: 508840, member: 12496"] Your first sentence answers the question in the second. That is all there is to it. If it is the SAME 50mm lens on both DX or FX, then it is of course the same lens, and it performs exactly the same on either camera - in every respect if all other conditions like subject distance remain the same. A 50mm lens made for DX might be "optimized" to have smaller diameter glass, which won't project as large an image, but it will be smaller and lighter and cheaper... than a 50mm lens for FX. But the crop factor effect is still the same for exactly the same lens on either camera. However, the smaller sensor "crops" the field of view from the lens (called cropping), so only the field of view changes ... The DX sensor sees a smaller view captured. The smaller sensor simply sees less of the lens image - and therefore the smaller image has to be enlarged more to view it at the same size as the larger FX image. This extra enlargement is the telephoto effect that makes us compare it to a 75mm view on FX. But the same 50mm lens is exactly the same lens on either body. [URL="http://www.scantips.com/lights/cropfactor.html"]Camera Sensor Crop Factor and Equivalent Lens Focal Length[/URL] [/QUOTE]

Verification