iShoot Tripod Mount Ring, Lens Collar Support Compatible with Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens (EF/F Mount), Bottom is ARCA Quick Release Plate for ARCA-Swiss Fit Tripod Ball Head
iShoot Lens Collar, Tripod Mount Ring for Sigma 85mm f/1.4 DG HSM Art Lens (Canon EF Nikon AF Sony E Mount), Metal Lens Support Bracket with ARCA-SWISS fit Quick Release Plate for Tripod Ball Head
iShoot CNC Tripod Mount Ring, 71mm All-Metal Lens Collar Support for Sigma 70mm f/2.8 DG Macro Art Lens (of Canon EF, Sigma SA, Sony E and Leica L Mount), Built-in Arca-Swiss Quick Release Plate