The front of our zoom lens, L10514 fits perfectly in this. Just unscrew the lens shade and insert the lens into the mount, then put the lens shade back. 115mm x 110mm x 12mm thick with a 90mm aluminum circle x 12mm high piece attached with 3 screws which can be easily removed. The aluminum circle piece rotates within the assembly. Mounting weighs 11.2 ounces.
