I use Nikon 35mm f/2d lense on my Nikon D90 but I am unable to change aperture of lens.
I have the aperture on the lens set to f22 and locked, I can change aperture with the buttons and the change is reflected on how is the shutter speed calculated. But when I take photo for example with aperture set to 22 (A mode) it is overexposed (pure white).
I get same result of photo (M mode) for settings A-2 S-400 / A-22 S-400 (A is aperture S is shutter speed).
Aperture ring of the lens works.