Why do older camera lenses have faster F-stops?

Started Apr 14, 2013 | Discussions thread
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Re: Why do older camera lenses have faster F-stops?
In reply to vjk2, Apr 14, 2013

autofocus doesn't make lenses dim - there are e.g. f1.2 AF lenses. It is of course an added cost though.

Making zooms with a constant wide aperture is harder & hence more expensive than making a prime with an equivalent aperture.

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