Just to save the impatient people some work. Since this article ended up being a long meandering discussion, I thought it best that we start with the final summary. ![]() In other words, whether your 50mm lens becomes “equivalent to” a 75mm or 80mm lens when used on a crop-sensor camera. And we’ll analyze whether there is actually an equivalency between certain focal lengths, when using a crop-sensor camera vs a full-frame camera. With this article, I want to help analyze what happens when you change lenses between a full-frame camera and a crop-sensor camera. And that there is no “equivalent focal length” when you go to a crop sensor camera.īut what really happens is more complex than that. The focal length doesn’t change – you just get less of the scene. One argument goes along the lines that the crop sensor is just that, a crop. And that’s because the topic is a complex one … and therefore the answer is (kinda) complex as well. The discussion (which tend to devolve into arguments) are convincingly made for both sides. The answers given on the photography forums are confusing – yes, the focal length effectively increases. No, it doesn’t. Two answers that are polar opposites. ![]() Whether a 50mm lens on a crop-sensor acts like a 75mm lens (on a 1.5x crop sensor) or 80mm lens (on a 1.6x crop sensor). When the differences between full-frame and crop-sensor cameras are discussed, there is an inevitable question about whether the crop sensor multiplies the focal length. Full-frame vs Crop-sensor comparison : Depth-of-field & Perspective
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