Really Right Stuff LCF-101 Replacement Foot for Sony FE 70-200mm f/2.8 and 100-400mm GM Lenses ($100 from B&H Photo) is an Arca-type compatible double-dovetail quick release mount. The low profile of this replacement foot provides a lower center of gravity for better balance when compared to the original foot of the telephoto lens. The CNC machined 6061-T6 aluminum plate has 1/4″-20 and 3/8″-16 mounting sockets in case there is no mounting clamp present, and an integrated QD socket is compatible with QD adapters, straps, and slings.
• Arca-type compatible double-dovetail mount for attaching multiple accessories
• Low-profile replacement lens foot with a low center of gravity
• Type II black anodized 6061-T6 aluminum with 1/4″-20 and 3/8″-16 mounting sockets
• Integrated QD socket is compatible with QD adapters, straps, and slings