Will a lenses without the A setting on the apeture ring work on a DS

"AV" means apeture priority. This means that you set the apeture that the camera will use, and it decides the shutter speed. The flashing "av" means that you've picked an apeture that the camera can't pick a suitable shutter speed for at this light level. I would suggest picking a different apeture, or switch the camera to full automatic mode via the dial on the top left of the camera.

Are you using a Nikon "d" lens? on my D70 Fee means that the lens apeture is not set to minimum. If you have an apeture ring, set it to minimum.

Having gone over a month without a response, I assume this is no longer a response.

There doesn't seem to be a problem with the 85mm.

Nikon has made a lot of different 50mm f/1.8 lenses, so I won't say anything about them without knowing which particular type.

I sent it to a Tamron repair center. Cost $100

I have the same prolem. I think it has soming to do with the Meter coupling lever , it protrudes top of the Nlkon F-mount on the front of your camera. it may be need of repair

F-- means that the camera cannot find an apeture with the other settings that it is on put yur ISO on auto and put the camera in automatic mode and it should work but it might be a problem with the apeture in the lense, in which case it would be very hard to fix and you would probably end up desroying the lense in the process, if you did not go to a specialist.

The green mark is the index for the aperture setting at 24mm, the yellow mark is the index at 50mm. These really only matter if you are setting the exposure manually and using an external meter. The green mark is the primary mark -- as you turn the ring you will notice that it lines up with a number at every clickstop, while the yellow one is a bit off.

The pull down lever you ask about is the aperture lock. Autofocus film cameras and all digital cameras expect the lens to be set at smallest aperture (highest number). They will give an FEE error if it is not set correctly. When you turn the aperture ring to smallest aperture you will be able to slide the white dot into position next to the orange mark, and that will lock the aperture ring so that it is not accidentally tgurned while using or changing the lens.

The apeture is toward the back part of the lens. Shine a light down into the front of the lens and turn the apeture ring, you should see it change size.

Rob

It's because you don't have the apeture/F-stop ring set to f22 on the lens.When yourcamera is in auto or program mode it needs to set the apeture itself.