Four Thirds (4/3)

What is Four Thirds (4/3)?

What is Four Thirds (4/3)?

A compact digital camera format designed around a 17.3 x 13mm imaging sensor, which is a quarter the size of a full-frame (35mm) imaging sensor. Four Thirds cameras and lenses are manufactured primarily by Olympus and Panasonic. Lenses are made by several manufacturers. A variation of Four Thirds is Micro Four Thirds, a mirrorless Four Thirds camera format, which is even smaller than standard Four Thirds format cameras. The sensors in Four Thirds and Micro Four Thirds are identical, but Micro Four Thirds optics cannot be used on standard Four Thirds camera bodies, due to their smaller lens mounts.

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