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D750 not reporting correct F/Stop with Nikkor 1.4D

lens 750 error nikkor

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3 replies to this topic

#1
BradHoehne

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Hi,

I just upgraded to a Nikon D750 and put my old Nikkor 50mm D F1.4 lens on it.   This lens (and my 50mm sigma macro) works great on my D300 and D7000, but on the D750 it reports the dreaded FEE error.  

I solved this problem by changing the Aperture setting from Sub-Command dial to "Aperture Ring", which I don't mind, since I've been using aperture ring settings on my old F3 for 25 years and am used to it.

However, when I do this, the camera does not report the correct aperture on the LCD screen.    At F1.4 it reports the aperture correctly.  However as I click to smaller and smaller apertures, it gets "off".  At F5.6 on the ring it reports F4 on the LCD.  At F16 on the ring it reports F8.   

 

 The exposures are darker than expected, indicating that the camera really thinks that the exposure is set to the one reported on the LCD screen.


Any ideas?

 



#2
Ron

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Nikon, in it's infinite wisdom, decided to remove support for older lenses... the ones that use indexing tabs to transmit f stop data to the camera, from the D7500. It supports only AF-S lenses that use electrical contacts to send this data to the camera.  I'm afraid that what you currently have is about the best you can hope for.

 

There is a section in the back of your manual that will list supported lenses.

 

--Ron



#3
Merco_61

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Ron is correct, if it was a D7500...

 

Check that the Ai coupler moves distinctly without any drag without at lens mounted. When you mount the 50, check that the finger on the body is firmly in contact with the ridge on the lens. If it works mechanically and still doesn't report the aperture correctly, there is a great risk that the component that transfers the movement to a varying resistance that the meter reads has a crack in it. The fact that it doesn't identify the aperture ring as fully closed, giving the fee error points in the same direction. If that is the case, it is time for a repair.


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#4
Ron

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oops... I misread. Thanks for spotting that, Peter.

 

--Ron







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