- The tripod mount ring body is built to original factory standards with an enhanced design that features a 180° quick-lock knob, replacing the traditional hand screw knob. This stainless steel locking mechanism allows for easy locking and releasing by rotating the knob and pulling it to unlock, supporting vertical shooting just like the original factory model. - The connection shaft has been upgraded from hollow to solid construction, providing added durability. The lens collar body has been thickened, and the inner wall is lined with PVC film to protect your lens. The overall weight is approximately 175g, making it lightweight yet robust. - This lens collar includes a 90mm long Arca fit quick release plate, compatible with 39mm Arca-Swiss fit tripod ball heads, panoramic heads, and clamps. This feature enhances practicality compared to standard lens collars without a quick-release plate. Additionally, it features 1/4" and 3/8" screw holes with stainless-steel anti-slip screws for secure direct attachment of the lens to the tripod. - The lens collar IS-TA1550 can be paired with the clamp mount converter IS-3950PRO (sold separately), making it suitable for hydraulic heads that have a Manfrotto structure. Use Cases: - Ideal for professional photographers needing quick transitions between horizontal and vertical shooting. - Perfect for landscape or wildlife photographers who require a stable and secure lens mount during extended outdoor shoots. - Beneficial for videographers who need to switch quickly between different tripod heads without compromising lens safety.