1.25" to C Mount Video Camera Barrel Adapter for Astronomy Description: Allows C mount cameras to be attached to any standard 1.25" eyepiece holders. For a 1.25" adapter mount type cameras with telescopes, compatible with standard 1.25" threaded filters. The adapter allows the camera to be put into standard 1.25" eyepiece holders. All , durable and strengthen. The inside of the adapter is fully threaded to minimize reflections. Specifications: Material: Metal Size: Approx. 32×30mm/1.26×1.18inch External Thread: M25 × 0.75 mm Internal Thread: × 0.6 mm Size: 1.25 inches Package Includes: 1 Piece 1.25" to C Mount Adapter Note: Please allow a slightly errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understanding and attention.