Nikon Z6ii + FTZ + 500mm f4 AFS gives fEE Error.

Discussion in 'Nikon' started by mike_halliwell, Apr 15, 2021.

  1. The above sums it up.

    The aperture ring is locked to f22.

    The lens has a knackered AFS focus motor and a repair was attempted but no spares are available.

    It works just fine in MF with my D850 with the aperture fully controllable from the body.

    Not only can I not get past the error, but there seems to be no Control Aperture with Ring option... (D850 Menu f4)

    In short, it won't work at all.

    I've got a dumb Nikon F > Z mount adapter somewhere, but thought I'd ask here before searching for it.....;)

    It seems you cannot tell the FTZ to be dumb...:(

    Am I missing something obvious...?

    Any ideas?
  2. Hmm, this is unfortunate. Can you contact some independent repair shops which might be able to help?
  3. I was just thinking you might contact Birna Rorslett who has a deeper understanding of how the lens CPUs work and what is needed for compatibility with mirrorless. She might be able to help you figure out what is wrong and if perhaps a CPU replacement in the lens would make the lens compatible also with Z cameras. If original Nikon CPUs for this lens are not available, it might be possible to use a third-party or a custom-made one.
    Last edited: Apr 15, 2021
    mike_halliwell likes this.
  4. Does the aperture ring on your 500 have the little tab that is supposed to engage the post at the 8 o'clock position of the FTZ telling the camera that the lens is set to the minimum aperture (they can break off on occasion)? The fact that the lens is working on the D850 is immaterial in this regard as the position of the aperture ring is sensed via the Ai tab, not via that extra tab on the aperture ring (which is used on the consumer DSLRs that do not have the Ai coupler).
    mike_halliwell likes this.
  5. Good thinking.

    I'm guessing something's been fundamentally changed in the comms. system so that it's fine with D and not with Z.

    In-case anyone wants to know, it's the first AF-S 500/4 D IF-ED version.

    EDIT. Just did a small test. The lens works just fine if I don't completely lock the lens onto the FTZ. The shutter speed shows and the aperture is f--. If i rotate to lock the lens there's various whirs and cluncks and fEE appears.

    In the not-quite-locked position the aperture shuts down to the aperture-ring set value when the shutter is triggered.

    EDIT 2. The same happens if I rotate the lens + FTZ > Z6ii out of lock.
    Last edited: Apr 15, 2021
  6. Firmware is
    C is 1.10
    MA is 1.10

    So, AFAIK, the latest versions.
  7. What happens if you just depress the switch on the FTZ without a lens being mounted? Have you verified that the aperture ring tab on the 500 really pushes that FTZ post down? I am talking about the switch that's visible in the 8 o'clock position of the FTZ in the left image here (sorry for linking to Ken Rockwell's page but he does have the best image of an FTZ): Nikon FTZ Lens Adapter Compatibility & Review ?
    mike_halliwell likes this.
  8. That's the normal behavior when there is no lens attached - isn't it?
    Hmmh, that doesn't sound right. I almost expect that Err should appear instead of fEE.
    mike_halliwell likes this.
  9. And the Gold Star goes to Dieter!

    No it doesn't, and oddly there's nothing anywhere near to it on the lens mount to touch it. Around the other side, nearer the top, yes.

    _MIK0261_DxO.jpg _MIK0263_DxO.jpg

    Maybe the lens mount has been modded?
    Dieter Schaefer likes this.
  10. OK, just had a real close look on the mount and there's a very small 'scar' at the 8 o'clock position!

    My little tab is GONE....:eek:

    .. and there-in lay the answer!

    Guess I can just wedge a matchstalk in the gap for now...:p
    Last edited: Apr 15, 2021
  11. Since it's a mechanical fault, it should be possible to have a replacement part made.
    mike_halliwell likes this.
  12. Not that I'm going to... but what happens if I semi-permanently 'wedge' the peg on the FTZ in the 'in' position?

    I guess i don't really get the point of it!
  13. Or find a replacement aperture ring?

    Just a switch to confirm that the aperture is indeed set to the minimum aperture on lenses so equipped.
  14. So, on a lens not equipped, ie a completely manual lens, say a T-Mount lens and adapter with no tab, it locks-up? Eh?

    I see what it's for, but it seems daft to lock up completely without one.

    or is the problem that the lens chip saying one thing and the FTZ saying something different?

    ie, if i taped over the pins on the 500mm f4 it would work just fine?
  15. I had a similar problem as here, on a D3200, which has the same min aperture switch. I found that there's enough slop in the linkage of some lenses to allow the lens to lock in without pushing the switch down all the way. If your lens does have an intact tab, it can damage the ramp on the switch, so be careful.

    I found in my case that a very slight burnishing of the sharp corner on the lens tab solved the problem. You don't need to file it, just burnish with smooth tool to take the sharpest point off the tab.

    If the FTZ adapter is like those low end cameras (and now the D7500 too, I guess), manual lenses, T-mounts and the like won't function except in manual mode, but do not return an FEE error. Only chipped lenses with aperture rings will do that.

    You can put a little shim, wood or cardboard or the like, between the aperture ring and the tab, to make it function, but of course you'll have to remember it falls out when you take the lens off. Maybe a little tapered wooden wedge, on a string, if you have to do it often. I don't know if there's any kind of glue with enough stickum to allow you to build up a new tab a drop at a time, but that might be worth a try if you don't want to have it repaired, or do real surgery on the aperture ring.
    mike_halliwell likes this.
  16. Ah, OK. It's a terminal argument between the lens's chip and the FTZ about the lack of tab.....:(
  17. Funny you should mention that....:D

    I've got a 600mm f4 with dead AF motor and as they found out during the repair, a dead CPU too.

    I'll check it's fully dead CPU wise and, i just checked, it DOES have its tab, swap the mount/aperture rings.
  18. Only if you also manage to disengage the automatic diaphragm lever that's being actuated by its counterpart in the FTZ adapter I would guess. Or if you only shoot wide open :cool:

    Same diameter though? Most likely - so the aperture ring from almost any lens would do the trick? Width could be different though.
    Last edited: Apr 15, 2021
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