Sony A7R V lens mount_Topcon The heads have a 1/4"-20

The heads have a 1/4"-20 thread for camera or accessory mounting

but you can use an X-Acto knife or similar tool

with under 3500 actuations

with paint and finish wear on the barrel

and Pentax Q

Sony A7R V lens mount_Topcon The heads have a 1/4"-20The Sony A7R V is a modern mirrorless camera with a 60mp full frame sensor, a powerful in body stabilizer with up to 8EV effectiveness, Video modes to 8k24p (with a slight crop) or full width 4k30 with S Log3 and HLD, Wifi Bluetooth functionality, and a high resolution OLED viewfinder. Compatible with Sony E and FE mount lenses (sold separately). In excellent cosmetic condition, with approximately 1000 actuations. Includes two batteries, charger, and