Could someone tell me why the red alert light flashes on my F4 after every shot?
With a new roll of film in the camera I might be able to click off 7-8 frames before the red alert light begins to flash after each shot. The film winds forward OK and if I turn the camera off and on again it will fire again, but the alert light always comes on. I had sent this camera to Nikon for a CLA and to have a look at this problem, but it keeps occurring with both the MB-20 and MB-23 battery packs. Kind of annoying. I have the camera ISO set to match the film and it does the same thing set to DX.
#1. "RE: Nikon F4 Red Alert Light" | In response to Reply # 0Mon 26-Nov-07 08:33 PM
Here's a bit of an update. I had 5 frames left and replaced the Nikkor 50mm 1.4D with an AIS lens and no problem. Tried a non-D AF zoom and no problem on the remaining frames. Put in a new roll and no problems with the non-D lenses. Put the 50mm 1.4D back on and the lights blinks. Change back to non-D and all's well again. What could this relationship be? I can't see any relationship from what I've read between the two things.
#2. "RE: Nikon F4 Red Alert Light" | In response to Reply # 1Kilted_F3_nut Nikonian since 29th Jun 2004Mon 26-Nov-07 08:44 PM
A lens that might have a flaky chip in it? That'd be my guess. If all the other lenses work fine, then it has to be something with that lens. I also have seen on older Nikons, where, if the stop-down lever, either on the lens, or on the body, is out of alignment, the shutter won't fire. Had an old Nikomat FTn that flaked out. In this case, it was on the body where the problem was. The stop down lever was bent toward the lens mount. So, when I had my 180f2.8 mounted, it wouldn't fire. Tried the lens on another Nikomat I owned, no problems. That's when I discovered the misalignment issue. Realigned it, worked like a charm.
F5, F2A, Nikomat FT2 - John Laughlin Photography - nature photographer
#3. "RE: Nikon F4 Red Alert Light" | In response to Reply # 2Tue 27-Nov-07 03:56 PM
Today I tried other D lenses and they worked fine with the F4. Tried the 50mm again and found that it works fine in A and M modes, but not in P and is sometimes yes and mostly no in S mode. It must be some quirk in this particular lens which otherwise works fine on mt D200.