Faulty Lense

My Pentax FA 80-320 lense won't auto focus and i've noticed that the automatic diaphragm pin lever does'nt spring back and even when i move it through the F stops one way the aperature opens up but when i turn it back again the aperature stays open. Could this also be the reason why i don't get any F stop readings in the view finder also why i can't manually set the aperature through the camera . My other lenses don't have this problem. Seems like a springs gone. I'm using it on a MZ6.

The aperture is locked open when the lens is off the camera, and can be stopped down with the lever on the back of the lens. This action should be snappy and without any hesitation.

If the lens is faulty a repair will be needed.

No the action is'nt snappy because when you move the lever the aperature opens but you then have to move the lever again to get the aperature to change.

I do apologise if the question is to complicated

Not too complicated at all, I think the answer is clear - the lens has a diaphragm fault and a repair will be needed.....

It may be possible to pick up a replacement lens on eBay more cost effectively than repairing the lens. It might be worth looking in to.

The lense was bought from a guy off e-bay it cost me £85, it was delivered damaged and he was'nt interested (long story). So now it's in for repair at my cost.

Ratcatcher, it's a LENS.

But I'm sorry to hear about your problems. I assume you left him a neg.

G