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<blockquote data-quote="§am" data-source="post: 207939" data-attributes="member: 9187">A 50mm lens is a 50mm lens whether you put it on a DX or FX body!What sets the two apart is, on an DX body you get the equivalent of a 75mm lens compared to the same lens on a FX body.As an example, take a picture with the FX body and 50mm lens, then from the same spot take the same picture with a DX body and the 50mm lens.&nbsp; What you get is a 'more zoomed/less wide/cropped' picture from the later.Now here's the most important thing for me... Am I likely to go to FX in the future anytime?Yes, then consider which lenses you buy now as DX lenses won't work (and that's a very loose term) fully on an FX body.No, then buy any lens that suits your needs as a FX lens will work on a DX body with no loss of quality (some may argue you get even better IQ with a FX lens on a DX body, but that's a different story all together)Remember, the &quot;equivalent focal length&quot; is only relative - so if you are never going to use FX or 35mm, then on your DX body for all intents and purposes, it doesn't matter about the &quot;crop factor&quot;</blockquote>

[QUOTE="§am, post: 207939, member: 9187"] A 50mm lens is a 50mm lens whether you put it on a DX or FX body! What sets the two apart is, on an DX body you get the equivalent of a 75mm lens compared to the same lens on a FX body. As an example, take a picture with the FX body and 50mm lens, then from the same spot take the same picture with a DX body and the 50mm lens. What you get is a 'more zoomed/less wide/cropped' picture from the later. Now here's the most important thing for me... Am I likely to go to FX in the future anytime? Yes, then consider which lenses you buy now as DX lenses won't work (and that's a very loose term) fully on an FX body. No, then buy any lens that suits your needs as a FX lens will work on a DX body with no loss of quality (some may argue you get even better IQ with a FX lens on a DX body, but that's a different story all together) Remember, the "equivalent focal length" is only relative - so if you are never going to use FX or 35mm, then on your DX body for all intents and purposes, it doesn't matter about the "crop factor" [/QUOTE]

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