Nikon FM2 - Manual (Page 23)

slower, it is advisabie to attach the camera to a tripod and use
a cable release to release the shutter; this will prevent camera
shake which results in blurred photographs. The cable con­
nector can be screwed into the hole at the center of the shutter
release button. If the tripod has a large head, contact between
the lens barrel and the head may make it impossible to turn the
lens aperture ring. In this case, use the special tripod adapter
supplied with the camera between the tripod head and the
camera body.
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