Fotodiox Pro Lens Mount Adapter - Compatible with Canon EOS (EF / EF-S) D/SLR Lenses to CS-Mount (1" Screw Mount) Cine & CCTV Camera Body nikon At the beginning the indicator

At the beginning the indicator light should be red

1DS Mark II

The cap fits tight and securely by simply twisting onto the camera

You turn the lockring until it’s tight

Fotodiox Pro Lens Mount Adapter - Compatible with Canon EOS (EF / EF-S) D/SLR Lenses to CS-Mount (1" Screw Mount) Cine & CCTV Camera Body nikon At the beginning the indicatorDescription Specs Compatibility > Notes Product Highlights: Mounts a Vast Range of Vintage Workhorse Lenses to CS Mount Cine & CCTV Cameras Enhanced craftsmanship and high tolerance construction for demanding professionals; Infinity Focus or Beyond Guaranteed Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter and no adjustments required Precision all metal construction with chrome plated brass mounts for secure