"atat This plate is designed for lenses with a tripod-mount foot up to 6"" (152 mm) long, and is precision machined from T-6 aluminum. Plate features a satin black anodized finish, and is ""Made in the USA"". Acratech quick release plates are compatible with any ""Arca-Swiss"" type quick release system (like Arca-Swiss, Graff, Wimberley, Foba, etc). Simply measure the length of the tripod mount on your lens and order the plate that is the same length or slightly longer. These camera plates are very lightweight, precision machined, and are well suited to nature photographers, landscape photography, large and medium format, digital and 35mm SLR cameras, outdoor photography where weight and a perfect fit are priority.|Acratech quick release plates are designed to allow access to all camera controls and functions without removing the plate.|Acratech quick release plates are designed to provide maximum contact area to the bottom of the camera increasing stability and helping to minimize flexing ofthe camera body.|We do not cut a groove under the head of the mounting screws which weakens them at a point where they are already most likely to break.|Our plates are precision C.N.C. machined from solid 6061 T-6 aluminum. We do notuse inferior castings like some manufacturers.|Made in the U.S.A.|We use advanced computer aided design software to create super strong lightweight plates."