iShoot Lens Flange Tripod Mount Ring IS-SM105ART Compatible with Sigma 100-400mm F5-6.3 DG DN OS (E mount) &Sigma 105 mm F1.4 DG HSM Art (EF mount /FX / FE / L) Bottom is ARCA Fit quick release Compatible with ARCA-SWISS / RRS Fit tripod ball head Features: 1. The lens flange is made of high-density, lightweight and robust aerospace aluminum; precision machined by world-class centrum high-end CNC lathe; hollow work processed finely by Multi-Diamond Cutter; 2. Tripod mounting ring surface using vibration polishing technology and multiple anodic oxidation greatly increased the color uniformity of the metal surface; the appearance and exquisite workmanship are much better than similar products made by molding method; 3. The tripod collar using laser scanning technology to accurately obtain lens parameters, and then accurately carve out the shape of the inner diameter of the tripod ring according to the data; 4. The lens mounting flange has been designed and improved with reference to the original Sigma TS-111;the inner diameter is about 82 mm,width about 18 mm,the inner wall has grooves and incisions, and a plastic folia protective 3M is attached;locking knob with non-slip design; 5. The bottom quick release plate of the lens bracket is about 65 mm long, adopts ARCA-SWISS / RRS 39 mm standard fit and reserved 1/4 and 3/8 screw holes, equipped with non-slip stainless steel screws, netto weight about 170g; 6. Lower quick release plate is standard, compatible with RRS / ARCA-SWISS / PMG / WIMBERLEY / MARKINS / PHOTOCLAM / SUNWAYFOTO / BENRO / SIRUI / MARSACE / ISHOOT with Arca 39mm ball head, fits iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64- FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK. Applicable to: Sigma 100-400mm f/5-6.3 DG DN OS (E-mount) Sigma 105mm f/1.4 DG HSM Art (EF/FX/FE/L-mount) Cannot be used with other lenses Package includes:1 x iShoot lens flange IS-SM105ART for Sigma 105mm F1.4 DG HSM Art and Sigma 100-400mm F5-6.3 DG DN OS (Other elements in photos,which are not on the list, are for illustration only and are not included)