SV238 connects to cooled cameras with 2 methods:1.Direct connection to M2.5-hole cameras with self-provided extension tube/T-Ring is required to achieve 55mm back focus 2.Connection via filter drawers/filter wheels(with holes); confirm compatibility by hole parameters in SV238 mechanical drawings. SVBONY filter drawer featuring the anti-light-leaking design that can effectively solve the light leaking issue under long exposure. The product is designed as a perfect circle, with a simple and beautiful appearance and good surface. Two pairs of strong magnets are used to achieve strong adsorption. 2-in-1 design, can use offilter1.25" & 2" specifications on the market. Meanwhile, by optimizing the threaded opening, it has been improved to have better OAG compatibility. SVBONY SV241 Astronomy Power adapter is a hub specifically designed for astronomical imaging and an invaluable assistant for shooting the starry sky. It integrates a plethora of power and data interfaces, featuring exceptional industrial design and hardware protection functionalities.