John Mustarde <[EMAIL PROTECTED]> wrote:
>When my A50/1.7 aperture got stuck, it was because one of the metal
>tabs inside the aperture ring, at the A button, had come loose. This
>loose piece of metal prevented the ring from turning through all the
>stops. So I removed the offending piece of metal, and now the aperture
>works fine.
This seems to be a common problem with A-series lenses (at least the 50/1.7 and
50/1.4) and happens because they cheaped out and attached thos springs by
molding plastic stubs through their mounting holes instead of using screws. I've
repaired a couple by drilling a hole in the appropriate spot and reattaching the
spring with a very small screw (still had to file down the head of the screw a
little bit for clearance). Definitely a case in which the use of plastic was
demonstrably inferior to metal.
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