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Nikon DSLR Cameras
D800/D800E
NIKON D800 E and macro
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<blockquote data-quote="WayneF" data-source="post: 204996" data-attributes="member: 12496"><p>There is no depth of field at macro distances, like 1:1.</p><p></p><p>The same lens is the same lens on either camera (FX or DX), it does nothing different at 1:1. (to get the same view, say exactly two inches of source height, DX has to stand back 1.5x farther than FX, but to get 1:1, both are at same distance).</p><p></p><p>The sensor size might affect how much you enlarge it later, but the image on the sensor is exactly the same image from the same lens at 1:1. The sensors are different sizes, and any difference in perceived or calculated DOF is simply due to enlargement factor to print size.</p><p></p><p>Technically, the FX frame has advantage there, simply because the usual DOF formulas assume a 1.5x larger <a href="http://en.wikipedia.org/wiki/Circle_of_confusion" target="_blank">CoC</a>.</p><p></p><p>If you check the calculations at <a href="http://www.dofmaster.com/dofjs.html" target="_blank">Online Depth of Field Calculator</a></p><p></p><p>105mm VR macro lens, f/22, at 1:1, which is at one foot (Minimum focus distance, which is measured from focal plane, which is about six inches working distance in front of lens), then</p><p></p><p>D800: 0.3 inches DOF</p><p>D7000: 0.2 inches DOF</p><p></p><p>This difference is simply due to the larger frame assuming a larger CoC will be acceptable (less enlargement necessary). <strong>The same lens does the same thing, and it is the same image.</strong> You may have to use it differently (enlarge the DX image more).</p><p></p><p>But, if you want DX, then the D800 certainly will allow a DX crop (using a smaller central area of the sensor), and still be 15 megapixels (nearly 16 mp, and larger than 12 mp). Or you can simply crop it yourself later, which is exactly the same thing again. The smaller sensor is simply a crop. Either way you crop it, then you have to enlarge it more, and the smaller CoC ought to be assumed. It is very arbitrary however, CoC assumes enlargement to some standard print size viewed from a certain distance, which may not be close to what you choose to do.</p></blockquote><p></p>
[QUOTE="WayneF, post: 204996, member: 12496"] There is no depth of field at macro distances, like 1:1. The same lens is the same lens on either camera (FX or DX), it does nothing different at 1:1. (to get the same view, say exactly two inches of source height, DX has to stand back 1.5x farther than FX, but to get 1:1, both are at same distance). The sensor size might affect how much you enlarge it later, but the image on the sensor is exactly the same image from the same lens at 1:1. The sensors are different sizes, and any difference in perceived or calculated DOF is simply due to enlargement factor to print size. Technically, the FX frame has advantage there, simply because the usual DOF formulas assume a 1.5x larger [URL="http://en.wikipedia.org/wiki/Circle_of_confusion"]CoC[/URL]. If you check the calculations at [URL="http://www.dofmaster.com/dofjs.html"]Online Depth of Field Calculator[/URL] 105mm VR macro lens, f/22, at 1:1, which is at one foot (Minimum focus distance, which is measured from focal plane, which is about six inches working distance in front of lens), then D800: 0.3 inches DOF D7000: 0.2 inches DOF This difference is simply due to the larger frame assuming a larger CoC will be acceptable (less enlargement necessary). [B]The same lens does the same thing, and it is the same image.[/B] You may have to use it differently (enlarge the DX image more). But, if you want DX, then the D800 certainly will allow a DX crop (using a smaller central area of the sensor), and still be 15 megapixels (nearly 16 mp, and larger than 12 mp). Or you can simply crop it yourself later, which is exactly the same thing again. The smaller sensor is simply a crop. Either way you crop it, then you have to enlarge it more, and the smaller CoC ought to be assumed. It is very arbitrary however, CoC assumes enlargement to some standard print size viewed from a certain distance, which may not be close to what you choose to do. [/QUOTE]
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Nikon DSLR Cameras
D800/D800E
NIKON D800 E and macro
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