Markins TB-30  type_Filters 6 lens is a full-frame

6 lens is a full-frame autofocus lens for film and digital Nikon F mount cameras

It'll fire the shutter when you mash the button

Ultimately

Includes adapters for 49mm

Markins TB-30 &nbsptype_Filters 6 lens is a full-frameThe Markins TB 30 is a head base for select Gitzo Series 3 tripods which replaces the centre column with a fixed plate for additional stability. Includes plate, stem bolt, and extension tube. The tube lets you connect your tripod's hook, but the plate can be installed without the extension tube & hook with the addition of a 3 8" nut (not included). Fits G1320, G1326, G1327, G3330, G3530, G3540 3540L tripods, as well as G3531, G3541, and G3541L models