Why do older camera lenses have faster F-stops?

Started Apr 14, 2013 | Discussions thread
hjulenissen Senior Member • Posts: 2,106
Some suggestions

It may be easier to design a razor-sharp 50mm f/1.8 than a razor-sharp 50mm f/1.0 (even if both are judged at f/1.8) if size, weight and cost constraints are similar. Substandard large-aperture lenses may have looked ok on 35mm film, but not on 36MP digital (or 24MP APS-C).

It may have been easier to design large aperture lenses for film than for micro-lense-equipped digital.

Lenses with IS seems to tend to have smaller max aperture. Don't know if it can be contributed to moving larger pieces of glass.


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