B3 LENS TO CANON EOS CAMERA ADAPTER with Tripod Mount Use professional Canon Fujinon Nikon 2/3" B3 (Ikegami Mount) lenses on: Canon 50D / 60D Canon T2i / T3i / T4i Canon 5D Mark II / 5D Mark III AND -- THE NEW BLACKMAGIC DESIGN CINEMA CAMERA WITH EOS MOUNT Deluxe adapter with tripod mount allows use of B3 lenses without a complicated rail system. The tripod bracket has 1/4" and 3/8" screw mounts. Adapter mounts lens to camera without having to remove camera mount as required by B4 adapter. Vignetting may occur at some focal lengths. To avoid this see next section. HOW TO GET FULL SENSOR COVERAGE: - On Canon T3i: use in "3x Crop Mode" - On Canon APS-C such as 50D/60D/T2i/T3i/T41: use built-in 2x plus a 1.4x tele-converter - On Canon full frame 5D Mark II / 5D Mark III: use built-in 2x plus a 2x tele-converter (may still be slight vignetting) Adapter is made of Duraluminum ( alloy of aluminium and titanium ) anodized black. The adapter was manufactured with pinpoint precision ( 0.01 mm ) and high strength to support heavy video lenses. Listing is for adapter only. Cameras and lenses shown for example and are not included. Listing is for adapter only. Cameras and lenses shown for example and are not included. FREE SHIPPING WITHIN THE UNITED STATES ONLY.