Cine C Mount to Canon EOS EF Lens Mount Adapter for Eclair Bolex NPR 16mm C Mount to Canon EOS EF mount adapter Allows you to use Canon EF camera lenses with C mount compatible equipment from Eclair, Bolex, Panasonic, Fujinon and others.  (Note: not compatible with the following Bolex models: SB, SBM, EBM, EL.) Using SLR camera lenses provides greater control of depth of field