1. The tripod mount ring support foot is tailor-made and compatible with Canon RF 600mm F11 IS STM and RF 800mm F11 IS STM, can't be used for other lenses； | 2. The lens collar stand is made based on the lens structure, the screw holes are precisely coordinated, and the anti-skid positioning pin is designed. It is locked by spring screws, with wavy handles; | 3. The tripod collar stand bottom is added 45mm long Arca fit quick release plate feature, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate. | 4. The Lens collar base bottom reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screw for fixing lens to tripod directly. | 5. The tripod mount ring base is made of Aviation Aluminum, CNC precisely machined, hollow-out weight reduction design, polished and surface anodized finish. The appearance and exquisite workmanship are much better than similar products made by mold.

1. This lens collar is tailor-made and compatible with Sigma 120-300mm f/2.8 DG OS HSM Sports lens; the tripod mount ring is referencing to and modified from Sigma original standard design TS-51, details are improved, quick release plate feature is added to the bottom, more practical than the original lens collar; | 2. The lens support adopts lightweight design of hollow, with stainless steel screw, net weight is about 278g, 82g lighter than the original tripod mount ring TS-51; the inner diameter of the tripod ring is about 87mm, the width is about 21mm, with 3M film inside for protecting the lens from scratches; | 3. The bottom of the lens bracket is 120mm detachable lengthening quick release plate, with 1/4? and 3/8? screw holes and stainless-steel anti-slip screws at the bottom; | 4. The tripod collar mount ring is made of high-quality Aviation Aluminum, lightweight and solid; precisely machined by world-class high-end CNC turning center, surface anodic oxidation; appearance and exquisite workmanship is much better than similar products made by mold; | 5. This lens holder bottom Quick Release Plate is 39mm Arca-Swiss fit, compatible with RRS / ARCA-SWISS / PMG / WIMBERLEY / MARKINS / PHOTOCLAM / SUNWAYFOTO / BENRO / SIRUI / MARSACE / ISHOOT ball head of Arca 39mm fit, suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK.

? This lens collar is tailor-made and compatible with Tamron 100-400mm f/4.5-6.3 Di VC USD (A035), Not compatible with 50-400mm f/4.5-6.3 Di III VXD A067 and other lenses; | ? The tripod mount ring is referencing to and modified from original standard design, details are improved, quick release plate feature is added to the bottom, more practical than the original lens collar; | ? The bottom of the lens bracket is 90mm detachable lengthened quick release plate, with 1/4? and 3/8? screw holes and stainless-steel anti-slip screws at the bottom; | ? The tripod collar mount ring is made of high quality Aviation Aluminum, lightweight and solid; precisely machined by world-class high-end CNC turning center, surface anodic oxidation; appearance and exquisite workmanship is much better than similar products made by mold; | ? This lens holder bottom Quick Release Plate is 39mm Arca-Swiss fit, compatible with RRS / ARCA-SWISS / ISHOOT ball head of Arca 39mm fit, suitable for iShoot IS-JZ30 / IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK.

1. This lens collar replacement foot is tailor-made and compatible with Sony E 18-110mm f/4 G OSS PZ, FE 70-200mm f/2.8 GM OSS, FE 100-400mm f/4.5-5.6 GM OSS, and FE 70-200mm f/2.8 GM OSS II Lens; can't be used for other lenses. | 2. The tripod socket is referencing to and modified from original standard design, details are improved, adopts lightweight design of hollow, with stainless steel screw, net weight is about 105g; it is about 90mm long, 65mm wide and about 31mm high. | 3. The tripod collar stand bottom is added 90mm long Arca fit quick release plate feature, compatible with Arca-Swiss 39mm fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate. | 4. The Lens collar base bottom reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screw for fixing lens to tripod directly. | 5. The tripod mount ring base is made of Aviation Aluminum, CNC precisely machined, hollow-out weight reduction design, polished and surface anodized finish. The appearance and exquisite workmanship are much better than similar products made by mold.

1. The tripod mount ring body adopts the original factory standard, and the structure is redesigned and improved. The original simple hand screw knob is upgraded to a 180° quick-lock knob. The quick lock device is made of stainless steel, rotate 180° to lock or release, and pull the knob to unlock; like the original factory, it supports rotating vertical shooting; | 2. The connection shaft of the tripod ring is changed from hollow to solid, the lens collar body is thickened, and the inner wall is pasted with PVC film to protect the lens; the overall net weight is about 175g; | 3. The lens collar bottom is added 90mm long Arca fit quick release plate feature, can be used with 39mm Arca-Swiss fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate; also reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screws for fixing lens to tripod directly； | 4. The lens collar IS-TA1550 can be combined with clamp mount converter IS-3950PRO (Sold Separately), which can be used for hydraulic heads with Manfrotto structure; | 5. The tripod ring is Compatible with Tamron 150-500mm f/5-6.7 Di III VC VXD A057, cannot be used for other lenses. Tips: There should be no stickers on the installation position of the lens. If there are, they should be removed, otherwise the installation will be affected.

1. The lens collar body adopts the original factory standard, and the structure is redesigned and improved, compatible with Tamron 50-400mm f/4.5-6.3 Di III VXD A067, can't be used for other lenses. | 2. The original simple hand screw knob is upgraded to a 180° quick-lock knob. The quick lock device is made of stainless steel, rotate 180° to lock or release, and pull the knob to unlock; the connection shaft of the tripod ring is changed from hollow to solid, the ring body is thickened, and the inner wall is pasted with PVC film to protect the lens. | 3. The tripod collar bottom is added 70mm long Arca fit quick release plate feature, compatible with Arca-Swiss 39mm fit tripod ball head, panoramic head and clamp directly; more practical than lens collars without QR-Plate. | 4. The Lens support bottom reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screws for fixing lens to tripod directly. | 5. The lens collar can be combined with clamp mount converter IS-3950PRO (Sold Separately), which can be used for hydraulic heads with Manfrotto structure.