Metal Tripod Collar Mount Ring 1/4", for Sigma APO 70-200mm F2.8 II EX DG Macro HSM - Ring Diameter (71mm)

I used a bit of felt held w double side tape to the collar to work w the Sony e mount rokinon 135 f2. Not perfect but works between aperture and focus collar. Can still use both

I'm enormously pleased with this lens tripod collar. It fits my lens perfectly (Canon EF 100mm f/2.8 Macro USM Fixed Lens), it is solidly built, and very attractive.

close color match to sigma lens fits my 150mm f2.8 lens fine