Nikon TC-17E II lens mount_Contax G not a modification

not a modification

The Minolta Extension Tube II is a 5-piece set of adjustable tubes designed for maximum macro flexibility- it even comes with a little fold-out sheet listing tube combinations and their magnification ratios

fast wide angle lens for Fuji X-mount cameras

They are designed to fit only a specific lens or several

image stabilizer

Nikon TC-17E II lens mount_Contax G not a modificationThe 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.