The Olympus OM20, also known as the OM G in some markets, is a 35mm SLR camera released by Olympus in 1983. It is similar to the OM10 but features a built-in manual shutter speed ring around the lens, eliminating the need for a manual adapter. Other advancements include a PC-sync flash connection, backlit shutter speeds and warnings in the viewfinder, built-in manual metering, and a flocked mirror chamber. The OM20 also offers a 'Lumi-Micron Matte' viewscreen, which is marketed as being one f-stop brighter than the previous model. A removable grip is included with the camera to improve handling. It was available in both chrome and black finishes.