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Help! Nikon D90 Mirror stuck

Started Sep 29, 2018 | Discussions thread
KenCK41 Regular Member • Posts: 221
Re: Help! Nikon D90 Mirror stuck

The problem is in the mechanism on the side of the mirror box. Possibly the lever that connects to the lens aperture setting is slightly bent or twisted. The aperture control mechanism is quite complex and parts do wear out.

It would require pulling the mirror box,   Figuring out the operation, and then access if it’s a bend restricting the aperture control lever or some deeper issue requiring parts replacement

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