Caliber-adjustable telephoto lens bayonet protector

The utility model discloses a caliber-adjustable telephoto lens bayonet protector, which comprises a hoop and a connecting plate assembly, a base is arranged between two ends of the bottom of the hoop, one end of the connecting plate assembly is fixedly connected with the base, and the other end of the connecting plate assembly is used for being fixed at the bottom of a machine body. The clamping device is characterized in that at least two jacking assemblies are fixed on the circumferential wall of the clamping hoop, each jacking assembly is provided with a jacking block which can stretch out towards the center of the clamping hoop and is used for jacking a lens barrel of the telephoto lens, and the base can stretch out towards the center of the clamping hoop and jacks the lens barrel of the telephoto lens. The long-focus lens fixing device can be firmly clamped on lens cones of long-focus lenses with different outer diameters. 本实用新型公开了一种口径可调式长焦镜头卡口保护器，包括卡箍和连接板组件，所述卡箍底部的两端之间装有底座，所述连接板组件的一端与所述的底座固定连接、另一端用于固定在