Features: Brand new and high quality. This adapter makes you attach your video camera with a 'C' or 'CS' thread to your telescope for prime focus photography. C-threads are commonly used in most consumer video cameras whereas the CS thread is mostly used in security cameras. The camera must have a standard removable C-mount lens, which is a 1" diameter thread. Will not work on video cameras with a fixed lenses or bayonet mount. Specification: Color: Black Material: Aluminum Alloy Outside thread: standard C thread (25.4mm) Internal thread: M28*0.6mm Outside diameter: 1.25in (31.7mm) Dimensions: 9*4.5*3.1cm/3.5*1.8*1.2in Weight: Approx. 19g Package List: 1 x Adapter Package List 1Brand new and high quality. 2This adapter makes you attach your video camera with a 'C' or 'CS' thread to your telescope for prime focus photography. 3C-threads are commonly used in most consumer video cameras whereas the CS thread is mostly used in security cameras. 4The camera must have a standard removable C-mount lens, which is a 1" diameter thread. 5Will not work on video cameras with a fixed lenses or bayonet mount.