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Message: <blockquote data-quote="bughunter" data-source="post: 1712677" data-attributes="member: 77542">Yes, but who cares about FOV?The user with a 500mm lens with a 1.5 crop factor get the bird full framed on his sensor as the other guy with a 750mm lens and a FF cam.So, both have a bird in the same distance full framed on the cam, THAT fact matters. So to the users it looks like using a 750mm also on the cam with crop factor.Of course there are differences later because of different numbers of pixels and if you compare the pics on pixel level, but that is not a point of discussion for a given cam.So for "daily discussions" it is ok to say as a first approximation, that a crop factor is increasing the focal length, if your target is to get a bird full framed.</blockquote>