Gitzo GS5370LB Quick Release Plate Long B lens mount_Leica Thread Mount is a good quality macro

is a good quality macro lens for Micro Four Thirds cameras

not the much more common (and terrestrial) Nikon F mount

This Yashica 124G is just back from a complete CLA and in nearly-new cosmetic condition

The SMC Pentax-M 50mm f1

focusing action is very slightly irregular

Gitzo GS5370LB Quick Release Plate Long B lens mount_Leica Thread Mount is a good quality macroThe Gitzo GS5370LB Quick Release Plate Square B quick release plate is designed for Gitzo off centre ball heads, among others (check your head's manual for compatibility). In good condition, with minor cosmetic wear, two 1 4" camera screws. Image is for illustrative purposes only. Actual item may differ slightly.