When I mount my Nikkor 85mm f1.8D lens to my D7000, the aperture is fixed on f16. The same lens works fine on D90. Other prime lenses work fine on the D7000. I previously shot with the 85mm on the D7000 with no problem. I started using Nikkor 24-70mm f2.8 but when I wanted to shoot with the 85mm again (after 3 weeks), I encountered the problem of not being able to change the aperture.
Use 85mm G series
If lens continues to work in your D90, then the issue is with your D7000 camera. U might want to contact Nikon to see if there is some sort of reset available for the electronics.
Also make sure that lens contacts are clean and free of dirt, etc.
SOURCE: D90 and Nikkor 17-55 problem. Lens won't come off
It's obviously in crooked. You will probably have to force it off but there is always the chance of damage.
SOURCE: got my Nikon d90 for
This is a common problem with this camera/lens conbo. I "solved" it by removing the lens, then reinstalling it - but hold the lens release button down, and rotate the lens a nuber of times (in the camera body) before releasing the button. It appears that the issue is poor electrical contact between the lens and camera body. If there is a poor contact, the camera will not know if thereis a focus and will lock the shutter release. With this poos contact, the camera will only fucntion in manual mode
Hope that this helps
SOURCE: I used the Nikon D90
That's the Nikon error message for a lens with aperture ring set to something other than the minimum (i.e. highest number).
The camera insists on controlling the aperture ring, and to do so, the ring must be set to the minimum setting.
Unless it is a "G" lens, which has no aperture ring whatsoever.
The camera body sets the aperture of the lens wide open while
auto-focusing, and displaying through the viewfinder. When it comes
time to flip the mirror up and take a picture, the camera dials the
aperture to the setting you (or the camera) have selected.
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I SOLVED THE PROBLEM! I had inadvertently switched one setting on the Custom menu and precisely the control f6 (customize command dials) . There's the setting "aperture setting" which has two options: 'sub-command dial' and 'aperture ring'. It should have been on the 'sub-command dial' but it was on the other one.
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