RainbowImaging V5 Lens Mount Adapter with Program EMF AF Focus Confirmation Chip for M42 Screw Mount Lens To Canon EOS EF Mount adapter, for Canon 5D Mark II, 7D, 50D, 40D, 30D, 20D, 550D, 500D, 450D, 1000D etc, (RainbowImaging Adapter)
This adapter allows you to use M42 Lens on EOS camera with V5 Program EMF AF Focus Confirmation Chip.With the help of the incorporated AF-Confirmation chipset, it will be indicated by the accurate auto-focus system of EOS camera with a red light and a sound signal, user doesn't need to guess the correct focus by naked eye. Features:•	You can set designed aperture in interval from F1.1 to F45.•	You can set designed focal length in interval from 1mm to 65535mm.•	Allow focus to Infinity.•	Date can be save even turning off the camera.•	When focus is correct, there will be an indicator of red light and a sound signal that will prove chosen focus•	AV / M Mode is supported•	This adapter will allow the camera to record the actual aperture or the maximum aperture when you take pictures. Compatible:Canon EOS Digital Camera 7D 500D 1000D，450D, 400D, 350D, 300D, 50D, 40D, 30D, 20D, 10D and 5D etc...(except EOS 30, 30V & 33V)Fits All M42 Screw Mount LensPackage Include* EMF AF Confirm Olympus OM Lens To Canon EOS EF Adapter* EMF Chip Setting Instruction