Converter for inserting as part of a pick-up lens for a TV camera includes an additional lens to alter the focal distance of first and second pick-up lenses and a fastening device to apply and withdraw the additional lens.

摘要

A converter has an additional lens (10) to alter the focal distance of first (20) and second pick-up lenses. A fastening device (22) applies and withdraws the additional lens to and from an object side of the first and second pick-up lenses. The additional lens acts as a wide-angle converting lens to reduce a picture by enlarging a viewing angle and creating a picture without vignetting within a picture range.