http://www.nikonchat.com/nikkor-af-50mm-f-1-8d/

I bought the 50mm f/1.8D AF Nikkor lens, and I have a Nikon D90. How I can change the aperture?
Do I have to change the opening rate Opening on the lens or should I change the aperture of the camera?
I'll have what you are smoking Mushtaq. Regarding the issue of objective 1) Turn the Dail aperture on the lens the largest number (f/22) and slide the little tab to fix there. 2) Turn the mode dial on the camera to a perturbation priority mode (). 3) Set the desired aperture by turning the dial on the front of the shutter button.
Nikkor 50mm f/1.8D review.MP4