Durable high temperature die-cast metal construction with CNC precision finishing provides lasting strength for heavy telephoto use. Surface features include built-in foil, copper button and non-slip stainless steel nails for secure grip and reliable performance. Specially designed tripod mount ring for Canon telephoto lenses: EF 70-200mm 1:4L lens EF 70-200mm 1:4L IS lens EF 70-200mm 1:4L IS II lens EF 400mm 1:5.6 L lens EF 80-200mm f/2,. 8L lens The lens collar follows the original standard design but has been refined: improved bearing for smoother operation enhanced detail for durability added quick-release plate functionality for faster changes Dimensions and mounting: inner diameter approximately 65.5 mm width approximately 18 mm bottom features a split structure with a 60 mm long quick-release plate equipped with 1/4 and 3/8 screw holes for versatile mounting 2-3 practical use scenarios: - Wildlife or sports photography using long telephotos (eg EF 70-200mm or EF 400mm) where secure support and quick plate access are important - Studio or field shoots requiring fast lens changes while maintaining balance on a tripod - Outdoor birding or nature shoots where a stable, heat-resistant mount reduces shift and wobble during long sessions This collar provides reliable compatibility, strong performance, and practical quick-release functionality without altering original lens geometry.