You have a pre-AI lens. The lens should have a cut into the rear part of the aperture ring, allowing it to engage the AI meter coupler on the camera. If it doesn't have this, then it is not too difficult to have it AI converted. But you should not do it yourself unless you know exactly what you are doing. The FE's meter coupler can be lifted up by pressing down the button next to it. That way a non-AI lens can mount. But it will not give you stopped down metering - you have to do that manually. So unless you shoot at full aperture, do not use the camera in aperture priority mode. Switch it to manual.
Originally Posted by peters8