UPGRADE YOUR B4 LENS TO MICRO FOUR THIRDS CAMERA ADAPTER TO THE LONG FOOT ! Extra Tall Heavy Duty Tripod Mount will accommodate more lenses and tripod plates THIS SECTION IS OVER 1 CM TALLER THAN THE STANDARD MOUNT, SO IT WILL WORK WITH MORE LENSES LIKE THE CANON WRS, WRSD, WRSE, AND MANY MORE MOUNTING CONFIGURATIONS THAN THE STANDARD ADAPTER. NO MORE SHIMMING YOUR MOUNT. YOU WILL RECEIVE ONE LONG REPLACEMENT SECTION AND TWO HEX WRENCHES REQUIRED TO REPLACE YOUR EXISTING SECTION. (Adapters and lenses shown in the photos are for example only and are not included) (For using professional Canon, Fujinon Nikon 2/3" B4 lenses on: - Panasonic Lumix G10, GF1, GF2, GF3, GF5, G2, G3, G5, GX1. GH1, GH2, GH3, GH4 - Olympus OM-D E-M5, Olympus PEN E-P1, E-P2, E-PL1, E-PL1s, E-PL2, E-P3, E-PL3, E-PM1, E-PL5, E-PM2 - Blackmagic Cinema Camera with Passive Micro Four Thirds mount ) 2/3" lenses in 1x do not cover the whole sensor of micro 4/3 camera so you should use this adapter with 2x extender. You can use 2/3" lenses in 1x without vignetting on Panasonic GH2/GH3 ( enable 1:1 crop mode). The adapter is adjustable for back focus however it should not require any adjustment. Set the back focus on your lens. Listing is for adapter only. Cameras, lenses, tripods shown for example and are not included. FREE SHIPPING WITHIN THE UNITED STATES ONLY.