The olympus fcon t01 fisheye converter is a dedicated teleconverter for use with the olympus tg 1 waterproof digital camera the fcon t01 fisheye converter enables wide angle shooting without sacrificing the brightness of the f20 lens the fisheye converter allows you to create unique shots with a rounded 130 degree angle effect and is waterproof up to a depth of 12 meters in order to attach the t01 fisheye converter to the olympus tg 1 you will need to purchase the olympus cla t01 conversion