PiCamera Canon rear cap (bfd=0.0)

This is a Canon lens adapter for Raspberry Pi Camera module. With a cheap Canon EF extension adapter (5 pc, cost 4~9 usd from ebay or Amazon), your Raspberry can mount any Canon Lens with EF mount. Remove the lens of Raspberry Camera module and attach it to a Canon extension tube (44mm or less) to make a Canon lens adapter for Raspberry Pi Camera Module. (The back focus distance is 0.0 mm, measure from PCB board of Camera module to the mounting plate) Note: A LED light blocker is designed in this adapter, however if you choose a non-black color option, you better turn off the LED by software. If you already own a FMD 3D printer, you can download FMD version here (http://www.thingiverse.com/thing:909176)