Viewfinder: Everything You Need to Know About It | Skylum Blog
Canon Waist Level Finder F1 (Old) at KEH Camera
This what peak waist level viewfinder stance looks like : r/AnalogCommunity
Waist Level Viewfinders Etrs Etrsi Focusing Screen With Protective Film Diy 3d Printing Product Camera Overhead View Finders - Photo Studio Kits - AliExpress