The B4 2/3″ to Sony F3 Lens Adapter Package from MTF Services Ltd includes two lens adapters, a B4 2/3″ to Canon EF adapter and a Canon EF to Sony F3 adapter. The kit enables the use of ENG style B4 2/3″ lenses on the Sony F3 camcorder as well as APS-C format cameras with the Canon EF mount. The B4/EF adapter features multi layer coated optics, and both adapters are of solid aluminum construction. A lens support bridge for use with 15mm rod support systems is also included. In order to avoid vignetting, the B4 2/3″ lens will need to have the 2x extender engaged and the camera’s image sensor should be Super 35mm or smaller. HD lenses are recommended.