Canon EF 100mm f/2.8 Macro USM EF100mm F2.8 MACRO USM Instruction Manual - Page 10

Using the Tripod Mount (Sold separately) Attaching and Detaching the Tripod Mount To attach the tripod mount, follow the illustrated procedure below. To remove the tripod mount, follow the procedure in reverse. Align the tripod mount adapter's index with the lens mount index. Push in the adapter onto the back of the lens. • The tripod mount adapter's inner lugs should slide into the grooves on the lens barrel. The adapter should not be able to rotate around the lens barrel. Loosen the tripod mount's lock knob. Align the lens mount index and the tripod mount's index, and slip on the tripod mount. Rotate the tripod mount to the desired position and tighten the lock knob. • You can loosen the orientation lock-knob on the tripod mount to allow it to rotate as needed to fit a particular camera model for switching between vertical and horizontal positions. Depending on the EOS camera model, if a battery pack or vertical grip is attached, the tripod mount may bump into it. If that is the case, remove the battery pack/vertical grip or the tripod mount. ENG-9