Nikon 1-mount
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The Nikon 1-mount is a type of interchangeable lens mount developed by Nikon for its Nikon CX format mirrorless interchangeable-lens cameras. The 1-mount was first introduced on the Nikon 1 series in 2011, and features a bayonet mount.
Nikon 1 V1 with Nikkor VR 10-100mm f/4.5-5.6 PD-Zoom and ME-1 stereo microphone in HD-video use
Nikon V1 with 10-30mm zoom fitted, and 30-110mm zoom to one side
Mirrorless camera
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A mirrorless camera is a digital camera which, in contrast to DSLRs, does not use a mirror in order to ensure that the image presented to the photographer through the viewfinder is identical to that taken by the camera. They have come to replace DSLRs, which have historically dominated interchangeable lens cameras. Other terms include electronic viewfinder interchangeable lens (EVIL) cameras and compact system cameras (CSCs).
A mirrorless camera (right) with an exposed sensor, next to a DSLR camera (left) which has a mirror in front of the sensor
Close-up of the lens mount (silver) and image sensor (red) in a mirrorless camera, showing the small gap between the lens and the sensor, with no mirror assembly
Pentax Q
Ricoh GXR