Re: SMC-A 20mm 2.8 diaphragm

[Peter Alling]

Either the oil is getting thick, (dirty), or the return spring is getting fatigued. A cleaning will most probably fix the problem, (if you can find someplace to do the repair). It might be difficult to justify the cost however.

At 12:11 PM 12/13/2002 +0000, you wrote:

Would some of you SMC-A 20mm 2.8 owners check the action of the diaphragm via the lever on the lens please. I have just bought one and it seems very sluggish. Most of my other Pentax lenses snap shut, but they do vary in their snappiness. This 20mm 2.8 glides shut and it seems scarcely fast enough to fully close when set at f22 with a fast shutter speed. I'm wondering if it's faulty.

Thanks

Anton

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