1. Using high-density aviation aluminum, automatic CNC machine tools, diamond multi-tool heads, hollow finishing; using vibration polishing technology, the accuracy is 20% higher than manual grinding; using multiple anodizing, the metal surface hardness and uniformity are improved by 20%. 2. Tailored according to the structure of the lens, it has the function of speeding up the plate installation at the bottom; the inner wall of the tripod ring bracket is an irregular ring, and the contact surface is a plastic synthetic film, which is closely combined with the lens. There should be no sticker on the surface of the lens, if there is, it should be torn off, otherwise it will affect the installation; lens rotation and vertical shooting are supported. 3. The bottom of the tripod ring bracket adopts RRS/Arca SWISS structure quick release plate, the plate length is about 50mm, there are 1/4 and 3/8 screw holes on the plate to expand the external quick release plate or tripod, and detachable stainless steel anti-slip screws. 4. For Tamron 35-150mm F2-2.8 Di III VXD A058 E-Mount, not for Tamron 35-150mm F2.8-4 Di VC OSD A043. 5. The tripod mount ring is attached to a tripod, and it helps you secure and balance a heavy or long-lens telephoto lens that hangs on the front of the camera. Applicable Model: IS-TA35150 Vertical Lens Tripod Ring Bracket For Tamron 35-150mm F2-2.8 Di III VXD A058 E Port Name: ISHOOT Name:Tripod Mount Ring Type:Camera Tripod Ring Use: Mirrorless System Camera color:Black Material:Aluminum alloy Package Contents: 1 x Tripod Mount Ring Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.