The Fujinon SE20B-2 is a 2x extender for B4 mount lenses. This model was designed to work with cameras and lenses utilizing 1/2" three chip image processors. This extender fits on the rear of the broadcast lens and offers the user twice the telephoto zoom range.
Back Focus
This extender allows the user to operate the standard back focus flange in the same way as without the extender.
2x Telephoto
This extender allows the standard zoom lens to double its telephoto focal length.