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Fuji 23 1.4 WR as ‘35-50mm’ zoom

Started 4 weeks ago | Discussions thread
Jeff Biscuits Senior Member • Posts: 1,166
Re: Fuji 23 1.4 WR as ‘35-50mm’ zoom

emirco wrote:

Let me google it for you

Google all the incorrect information you like 🙂 A far perspective produces background compression. It’s just that if you have a far perspective with a wide angle lens, you’re going to have to crop so much to create an image of only the distant elements that you’ll struggle to print a postage stamp, so people tend not to do it. But a wide angle lens will give you exactly the same compression as a telephoto if you stand in the same place to use both.

Take a compact camera as an example. The Lumix TZ90 has a whopping 720mm-equivalent telephoto lens. But it’s only actually 129mm, which would be a portrait lens on 35mm film. The reason why it gives such a telephoto view is that it’s only using a small area of projected image. (Of course, small sensors pack their pixels more densely than large sensors, so you end up with similar resolution when you use a sensor designed to only use a small area.)

This is exactly the same as cropping: you use a smaller area of projected image, and the result is the same as using a longer lens with the same size of aperture (but with the longer lens, that same aperture would have a smaller f-number, because f is the focal length).

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