Really Right Stuff L-Plates for Sony A1 and Fujifilm GFX100S
Available for pre-order:
Really Right Stuff L-Plates for Fujifilm GFX100S
Really Right Stuff L-Plates for Sony A1
I generally prefer the "ultralight" variants when offered, as with the A1. Video and studio shooters might want the modular, adjustable design for ingress of cables.