https://www.markinsjapan.com/plate/camera/psa9/?selected_section=discussion
Markins PS-A9 Camera Plate for Sony A9 A7III A7RIII | Trinple
Markins PS-A9 is an anti-twist style custom camera plate for Sony A9 A7III A7RIII camera It can be converted to an L-Plate L-bracket with optional sub plate...
camera platefor sonymarkinsps