- This adapter allows B4 2/3" mount broadcast lenses be used in Canon EOS APS-C cameras. - 2/3" lenses does not cover whole sensor of EOS APS-C cameras, so you need to use the 2x extender, o/w you will see vignetting. - 100% brand new. MADE combined with aluimium and brass - Diaphragm control of the lens is set manually. - Automatic diaphragm, auto-focusing,or any other functions will not operate correctly while using this adapter. - Infinity Focus. Auto Focus(AF) is not available.
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