The Spider Camera Holster SpiderPro
Lens Collar Plate is designed to attach to the bottom of a foot
on a telephoto lens collar, and it is recommended to use with telephoto
lenses that range in size from 70-200mm and larger. Furthermore, the
plate has threaded sockets on either side, so the pin can be switched
for left- or right-handed users. Additionally, the aluminum and
stainless-steel plate has a dovetail on the bottom, which is compatible
with Arca-type ball heads or clamps.