Originally posted by Igilligan some of the M42 lenses have a pin on the back that closes the aperture. If that pin is not depressed... the lens is always wide open on the camera, no matter what ap you set it at.
If it is a regular K mount M lens, you should see the aperture closing as you turn the ring. And the camera should meter to the closed ap.
Thanks for the help..I should have mentioned it was a K-Mount Lens. I agree with what you say, but the camera is not responding to any aperture changes I make.
Originally posted by Laurentiu Cristofor Oily aperture blades maybe? If it's K mount, press the blade on the mount side and see if the iris blades are responsive. The blades should close fast for the lens to be usable stopped down. If they don't, then you need to take the lens for a cleaning.
I wish that were the case (well not really..lol), then I would understand what might be wrong.
When the lens is off the camera the blades are perfect and move freely as I select different apertures and press the blade on the mount side. When on the camera...nothing happens??? This has got me stumped!!
Thanks for the help anyway ;-)