24mm-K's

[Daphne]

looks like 1975 vintage yielded both a 24mm f2.8 and a 24mm f3.5! but
the f3.5 lens has a 58mm thread - how come? dont fast-er lenses get the
bigger glass?
more to the point - which one would you advice me to look for, in terms
of optical performance?

Daphne

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