Nikon F4, stopping all the way down lenses

[Sid836]

Dear All,
I have bought a replacement for my faulty Nikon F4, and it has a problem too.
Attaching any AF-D lenses to it, in the P and S modes it stops the lens down to f/22 no matter what the reading in the viewfinder and a blinking led alert comes up halting the camera.
In A and M modes where I move the ring on the lens by hand it stops down to the selected value.
Has anybody any experience like that on that camera? Should I start looking for a third one?

Many thanks in advance.

 

[jwicaksana]

I never experience that with my F4. Did you lock the lenses all the way to the smallest aperture?

 

[Mablo]

Hmm... over the years I've had problems with some of my AF-D lenses. More specifically the f/22 lock faults and the camera doesn't always get the information the lens is locked. My 28mm/2.8 AF-D f-lock is totally finished.

Having said that, my F4s body just recently started to act up offering me really odd exposure values...

 

[sevo]

Attaching any AF-D lenses to it, in the P and S modes it stops the lens down to f/22 no matter what the reading in the viewfinder and a blinking led alert comes up halting the camera.

So the finder shows some appropriate value, while the lens stops down fully, right? If you are lucky, the camera does not get the positional electronic aperture information from the lens - if you are even more lucky, that is only a matter of a dirty or blocked contact pin in the mount. In the worst case, the aperture control servo might have failed. But even then chances are that someone might make a good one out of your two broken F4s - it is unlikely that the first had the same flaw.

 

[Sid836]

So the finder shows some appropriate value, while the lens stops down fully, right? If you are lucky, the camera does not get the positional electronic aperture information from the lens - if you are even more lucky, that is only a matter of a dirty or blocked contact pin in the mount. In the worst case, the aperture control servo might have failed. But even then chances are that someone might make a good one out of your two broken F4s - it is unlikely that the first had the same flaw.

Yes, that is the case. Viewfinder reads say 3.2 and the lens... Snap! All they way down to f/22.
The lens must be o.k. because in my D90 it performs flawlessly. So I guess it is a camera's problem. When I unlock and move the aperture away from the min, I get the FEE in the viewfinder so it seems that the min aperture value is communicated to the camera.
The last suspect is the the servo.
My other camera is just not loading the film correctly so I need to find someone to use parts from it to fix the later. Hopefully not at a price of buying another one 🙂