Disclaimer : This is not a scientific article, but rather an attempt to give a basic understanding of how the different focal lengths impact the image. Let's talk about focal lengths and why they matter. After all, the first thing we refer to, when talking about lenses, is the focal length. Do we need an 18mm, a 35mm, or a 85mm lens? And is one focal length enough, or should we rather get a zoom lens, covering a range of focal lengths? The 18-55mm, maybe? Does it even really matter? I mean, we can get a 50mm lens, and then move back, when we need more within the frame, and closer when we need to be more focused on the subject, right? Well, the obvious answer is that, no. it isn't always this simple. We might be in a tight space, and still be needing to include a lot within the image. In that case a lens with a long focal length, such as the XF 90mm f/2, might not be very helpful. Or even the XF 50mm f/2. If we can't move far enough back, to include everything within the fra...
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