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I just got a used Nikon 28mm 2.8D lens to use with my D600. I need to set the aperture on the lens to f22, but the aperture ring lock seems stuck in place. It will not budge. I don't want to force it too much and break it. Is there a way to fix this? Thanks.

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    Take it to a professional to repair. – Matthew Feb 28 '18 at 16:12
  • You don't have to set the lock to use the lens; just twist the ring to f/22, leave it there and shoot. The camera will complain if you knock it out of position. – Blrfl Feb 28 '18 at 19:00
  • Are you saying that the aperture lock switch is locked when the aperture ring is not set at ƒ/22, and that the aperture ring won't move because of the stuck lock? – scottbb Feb 28 '18 at 19:33
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The aperture ring lock only locks the aperture to minimum aperture (f/22 on this lens). If the lock is engaged, your ring will be at f/22 and will not be movable. If your aperture ring is on another aperture, chances are that the lock is not actually enabled, but rather, the mechanism is jammed. In this case, you'll need to have your lens professionally serviced.

I owned this lens for many years and its diaphragm jammed up with lubricant from inside the lens, so there's a decent chance that the same has happened to you. If the blades are jammed, the ring won't turn.

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