The Canon C300mkII PL Modification Kit allows users to convert their Canon C300mkII camera to PL Mount through a short modification process. All necessary tools are included in the kit. The PL Mount is made of aircraft grade aluminum and includes the PL port cap. Shims are provided with the kit for adjusting back focus and the appropriate shims are installed prior to shipping. Further adjustment should not be needed but can be checked using a wide angle lens and a focus chart. The modification process can be reversed! If you choose to go back to EF mount in the future, you can do it by reversing steps in the process. Important Note: While the vast majority of lenses are compatible, due to the ND filter turret on the Canon C300mkII, lenses with a rear protrusion longer than 33.5mm, measured from the PL flange, are not compatible. This modification is not compatible with the C100, C100mkii, C200/200B, C300, C500 or C700. Includes: 6x M2.5 socket cap screws for PL installation, 1x Shim set, 1x Jeweler's Screwdriver, 6x M2.6 Phillips screws in case Canon body screws are lost *Camera is not included. Shim set (stackable to achieve necessary thickness): Silver .0127mm (0.0005"), Amber .0254mm (0.001"), Purple .0381mm (0.0015"), Red .0508mm (0.002"), Green .0762mm (0.003"), Tan .1016mm (0.004"), Blue .127mm (0.005") Specifications: Weight: 251g (0.6 lbs), Dimensions: 85.1 x 81.8 x 48 mm (3.4 x 3.2 x 1.9 in) Compatibility: NON COMPATIBLE LENSES: Lenses with a rear protrusion longer than 33.5mm, Angenieux Optimo DP Rouge 16-42mm, Angenieux Optimo DP Rouge 30-80mm