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<blockquote data-quote="nickt" data-source="post: 287479" data-attributes="member: 4923">I'm going to answer the question you did not ask YET, lol. But it helps answer your original question from a different point of view. What is the difference between a 300mm dx lens and a 300mm fx lens?They are both 300mm. The fx lens is a regular 300mm lens, same as you would use on 35mm film camera. It will work the same way on either a dx or fx camera. A dx sensor will not capture the entire image. Some of the image will be cast outside the footprint of the sensor, hence the 'crop'. In processing, that image will be enlarged to a standard size, creating the zoom effect, giving a smaller field of view like a 450mm lens would have given.The dx lens is still 300mm, however, corners were cut, literally and figuratively. It was designed to be a less costly lens for use on the smaller dx sensor. It casts only enough image to cover the dx sensor. If you used it on a fx body, you would get vignetting or your Nikon camera will automatically crop it to dx size if you want.Also a point to note on 24mp dx vs 24mp fx... the pixels on the dx are smaller.</blockquote>

[QUOTE="nickt, post: 287479, member: 4923"] I'm going to answer the question you did not ask YET, lol. But it helps answer your original question from a different point of view. What is the difference between a 300mm dx lens and a 300mm fx lens? They are both 300mm. The fx lens is a regular 300mm lens, same as you would use on 35mm film camera. It will work the same way on either a dx or fx camera. A dx sensor will not capture the entire image. Some of the image will be cast outside the footprint of the sensor, hence the 'crop'. In processing, that image will be enlarged to a standard size, creating the zoom effect, giving a smaller field of view like a 450mm lens would have given. The dx lens is still 300mm, however, corners were cut, literally and figuratively. It was designed to be a less costly lens for use on the smaller dx sensor. It casts only enough image to cover the dx sensor. If you used it on a fx body, you would get vignetting or your Nikon camera will automatically crop it to dx size if you want. Also a point to note on 24mp dx vs 24mp fx... the pixels on the dx are smaller. [/QUOTE]

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