SV226 filter drawer adopts integrated CNC molding and anti-light leaking design. It can compatible with 1.25" & 2" specifications filters on the market. Strong magnetic attraction, prevent the filter from falling off. The threads on both sides of the SV226 filter drawer are M48x0.75 internal threads and M42x0.75 external threads, which are compatible with most specifications of astronomical cameras. Note: If you want to connect with a dslr camera, you need to use an additional camera adapter.The SVBONY filter is a better choice for all digital imaging with digital cameras; DSLR camera; CCD cameras; modified Webcams and telescopes. The UV-IR-Cut filter uses the very latest coating technology to deliver the high filtration quality and lifetime durability.The UV-IR cut filter combine with any of the other Baader filters screws into the back of the eyepiece or camera adapter to block out the chromatic aberration unwanted.