Nikon TC-17E II lens mount_Bronica SQ The Tamrac Expedition 6X is

The Tamrac Expedition 6X is a mid-sized backpack that really looks like it means business: it's covered in pockets and retaining straps

4b head is an old-school all-metal tripod head with three-way adjustment

etc) and Canon's arguably much more useful Real Time mode

One end loops around the tripod legs

Nikon TC-17E II lens mount_Bronica SQ The Tamrac Expedition 6X isThe Nikon TC 17E II is an autofocus teleconverter designed for select Nikon AF S telephoto lenses (here's Nikon's compatibility list). Provides a 1. 7x focal length boost, loses about a stop and a half of light. In good cosmetic condition, with minor paint and finish wear. Good optics and function. Includes caps.