Longer focal lengths produce larger subjectdetail on the sensor at any given distance, Now let’s talk about the lens for a moment, the image forming device that projects our picture on to the sensor. So there is really no “Standard” when it comes to identifying a sensor size. They range from the APS-C (15.7 x 23.6 mm), the APS-H (19 x 28.7 mm), four thirds systems (13 x 17.3 mm), and even smaller. And there are now several sizes of “crop sensors”. It is simply a sensor that is smaller than the full frame cousin. Second, I truly believe that the term, “crop sensor” is a misleading term. That’s the same size of our old standby, the full-frame 35mm film negative or transparency. For example, this can be very useful when shooting sports, wildlife, and other types of photojournalism…” both from: įirst let me state two facts: One, images from crop sensor cameras are not inherently of lower quality than those of full-frame cameras and, two, crop sensor cameras produce exactly the same in-camera image magnification as do their larger full-frame brothers.īefore I take this discussion of why these facts are true, let’s understand some things about cameras and their sensors.įirst, a full-frame sensor gets its name from the fact that is physical measurements are, in round numbers, 24 x 36 mm. It can also be very effective for telephoto photography for the extra reach gained from the crop sensor multiplier. “…while a crop sensor DSLR doesn’t provide the same level of image quality as a full frame DSLR, it does sic. The amount of difference in the field of view or focal length with a crop sensor is measured by its “Multiplier.” And, If you are using a crop frame camera the sensor is cropping out the edges of the frame, which is effectively increasing the focal length. “Focal length measurements on lenses are based on the 35mm standard. “…the Mark IV has the 1.3 crop factor and a higher megapixel count than the D3s, which are nice for telephoto work.” You can take advantage of the crop factor to get maximum detail at long distances.” “For nature, wildlife and sports enthusiasts, it might make more sense to stick with a smaller sensor. Let me provide a couple of examples of that talk: And two, the wildlife photographers who want large in-camera images and who use a crop sensor camera believing the crop sensor somehow produces greater subject magnification. I feel this misleading language comes from two camps: One, the marketing folks who try to tell us that with a 1.6 crop sensor our 200mm lens is now a 320mm lens. This thinking is both incorrect and continues to mislead the photography world. I am disturbed by a lot of talk over the last few years stating that cameras with “crop sensors” produce larger in-camera subject size to cameras with full frame sensors. Why crop sensor cameras do not produce greater subject magnification than their full-frame brothers.
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