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Nikon DSLR Cameras
D750
28-300mm on D750 -- Is this a dumb idea?
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<blockquote data-quote="WayneF" data-source="post: 650802" data-attributes="member: 12496"><p>FX or DX sensor makes no difference about "fast". f/2.8 is f/2.8, regardless of which sensor is behind it. The sensor merely might crop the view it offers.</p><p></p><p>Most of the faster f/2.8 lenses are full frame lens, but that's just because full frame better justifies the greater lens price.</p><p></p><p>If you want long telephoto results, the DX sensor is popular for that (for example, sports and wildlife). </p><p></p><p>The fact is that a 300 mm lens is a 300 mm lens regardless of which sensor is behind it, it performs exactly the same as it always did, i.e., 300 mm on any sensor.</p><p></p><p> But the smaller DX sensor merely crops the lens view smaller. Then when we enlarge the smaller image more to be equivalent size again, the enlargement gives a telephoto appearance. In contrast, the larger uncropped FX image offers the wider full view.</p><p></p><p>You can see the same thing in your photo editor with any image by merely zooming in larger. That crops and enlarges, exactly same effect as is seen with the DX sensor. Enlargement is enlargement, and it looks "telephoto" then. But this enlargement is a very different subject than "fast".</p></blockquote><p></p>
[QUOTE="WayneF, post: 650802, member: 12496"] FX or DX sensor makes no difference about "fast". f/2.8 is f/2.8, regardless of which sensor is behind it. The sensor merely might crop the view it offers. Most of the faster f/2.8 lenses are full frame lens, but that's just because full frame better justifies the greater lens price. If you want long telephoto results, the DX sensor is popular for that (for example, sports and wildlife). The fact is that a 300 mm lens is a 300 mm lens regardless of which sensor is behind it, it performs exactly the same as it always did, i.e., 300 mm on any sensor. But the smaller DX sensor merely crops the lens view smaller. Then when we enlarge the smaller image more to be equivalent size again, the enlargement gives a telephoto appearance. In contrast, the larger uncropped FX image offers the wider full view. You can see the same thing in your photo editor with any image by merely zooming in larger. That crops and enlarges, exactly same effect as is seen with the DX sensor. Enlargement is enlargement, and it looks "telephoto" then. But this enlargement is a very different subject than "fast". [/QUOTE]
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Nikon DSLR Cameras
D750
28-300mm on D750 -- Is this a dumb idea?
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