Gosky 2inch Adjustable Telescope Camera Adapter Kit for Sony Alpha SLR/DSLR- Prime Focus Perfect for prime focus photography with short back focus telescope Fits all standard 2" astro telescopes. Fits all Canon EOS SLR/DSLR Cameras. Allows you to vary the magnification by simply changing the position of your camera. Threaded for Standard 2" telescope Filters. All metal construction. Anodizing Aluminium process. ^_^ Lifetime warranty: We have confident in our products and take full responsibility of the quality! ^_^