Why do older camera lenses have faster F-stops?

Started Apr 14, 2013 | Discussions thread
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Re: f1.8 equivalents...
In reply to EinsteinsGhost, Apr 17, 2013

Many different parameters are involved in sensor light gathering.

Metabones is just an example, a cute lens design (which I haven't seen in any APSC specific lenses) can get more light reach a smaller sensor without changing real f number (focal length / diaphragm diameter). This will become a new discussion about sensor sizes, pixel sizes, photons, electron vs photon conversion, etc etc.

So I think the discussion is just getting .... Out of focus

Let's talk about good, bright oldies.

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