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Nikon DSLR Cameras
D850
DX Mode
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<blockquote data-quote="ISOhappy" data-source="post: 642660" data-attributes="member: 44145"><p>I don't think that's what most people are referring to when they say reach. If it were simply recording a smaller FOV (which you're right, it is), there would be no advantage to using a DX camera because you could simply crop the FX frame down to DX and have the same image. However, the camera with the higher px density has more "reach."</p><p></p><p>Here is an excerpt from another thread:</p><p></p><p></p><p>"Let me give an example.</p><p></p><p> If you have a 24mm X 36mm full-frame sensor with 24MP, it is 6000 pixels X 4000 pixels, meaning that each pixel is 6 microns square. Lets say we have a 300mm lens and we're photographing a 6 meter square that's 300 meters away. That's going to put a 6mm square image on the sensor. The image is then recorded on 1000X1000 pixels.</p><p> A Nikon 24MP crop sensor is 16mm X 24mm. But it's also 6000 pixels X 4000 pixels, so each pixel is 4 microns square. Put the same 300mm lens on it and photograph the same square. It will still be 6mm X 6mm on the sensor but it will be 1500 X 1500 pixels. That's the greater reach.</p><p> This is different from digital zoom in that you don't get more pixels with digital zoom since you're stuck with the same sensor.</p><p></p><p> -- hide signature --</p><p>Leonard Migliore"</p><p></p><p><a href="https://www.dpreview.com/forums/thread/4185586#forum-post-59886918" target="_blank">https://www.dpreview.com/forums/thread/4185586#forum-post-59886918</a></p></blockquote><p></p>
[QUOTE="ISOhappy, post: 642660, member: 44145"] I don't think that's what most people are referring to when they say reach. If it were simply recording a smaller FOV (which you're right, it is), there would be no advantage to using a DX camera because you could simply crop the FX frame down to DX and have the same image. However, the camera with the higher px density has more "reach." Here is an excerpt from another thread: "Let me give an example. If you have a 24mm X 36mm full-frame sensor with 24MP, it is 6000 pixels X 4000 pixels, meaning that each pixel is 6 microns square. Lets say we have a 300mm lens and we're photographing a 6 meter square that's 300 meters away. That's going to put a 6mm square image on the sensor. The image is then recorded on 1000X1000 pixels. A Nikon 24MP crop sensor is 16mm X 24mm. But it's also 6000 pixels X 4000 pixels, so each pixel is 4 microns square. Put the same 300mm lens on it and photograph the same square. It will still be 6mm X 6mm on the sensor but it will be 1500 X 1500 pixels. That's the greater reach. This is different from digital zoom in that you don't get more pixels with digital zoom since you're stuck with the same sensor. -- hide signature -- Leonard Migliore" [url]https://www.dpreview.com/forums/thread/4185586#forum-post-59886918[/url] [/QUOTE]
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