Image sensor format
Videos
In digital photography, the image sensor format is the shape and size of the image sensor.
Different Sizes of Omnivision CMOS sensors An OV7910 (1/3") and three OV6920 (1/18") sensors, both types with composite video (NTSC) outputs.
Mirrorless camera
Videos
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