AF confirm adapter for Nikon F mount Lens to Canon EOS EF mount - AI AI-S version - 7D 60D 600D Cine camera extension of helicoid ring is

extension of helicoid ring is about 24mm to 30mm

73m --------------SUMMICRON 90/2 V3

64x Speed Booster reduces the full-frame crop factor of the BMCC from 2

: 60mm F/2

AF confirm adapter for Nikon F mount Lens to Canon EOS EF mount - AI AI-S version - 7D 60D 600D Cine camera extension of helicoid ring isThis is the AF confirm chipped lens adapter ring with built in circuit board for Nikon F mount lens on your Canon EOS EF mount camera, saving you the expense of a costly and irreversible conversion. Focal length and aperture values are fixed and not programmable, but value can be controlled from F 1. 4 to F 4. 0 for exposure control. It is not suitable for several full frame 5D series cameras because of depth of lens mount. Please contact us on