Opto Engineering C-Mount Macro Lens for 2/3" Detectors (3x)
Amazon.com : Fotasy MD Lens to C Mount Adapter, Minolta MD Lens to 16mm Cine Mount Adapter, compatible with Cine Movie Making System/ C Mount CCTV Camera/ C-Mount Microscope Cameras : Electronics
C-Mount Lenses for Mirrorless Micro 4/3 and APS-C? : 6 Steps - Instructables