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![What function does this small button / lever on the bottom left of the lens mount's outer diameter perform. The camera is a Nikon D5500 : r/Cameras What function does this small button / lever on the bottom left of the lens mount's outer diameter perform. The camera is a Nikon D5500 : r/Cameras](https://preview.redd.it/xk47205v29491.jpg?width=640&crop=smart&auto=webp&s=85cf627b66da58ae6f14a82e050f67d80c1fa0ff)
What function does this small button / lever on the bottom left of the lens mount's outer diameter perform. The camera is a Nikon D5500 : r/Cameras
![What function does this small button / lever on the bottom left of the lens mount's outer diameter perform. The camera is a Nikon D5500 : r/Cameras What function does this small button / lever on the bottom left of the lens mount's outer diameter perform. The camera is a Nikon D5500 : r/Cameras](https://preview.redd.it/9d1cujev29491.jpg?width=640&crop=smart&auto=webp&s=603452b360f219e62748bb58121799bddee4f7b2)