SV226 Telescope Filter Drawer Holder 2 inch is designed for SV226 filter drawers, it provides you with a more convenient combination, for deep sky astrophotography.More precise production process; strong and sturdy. With this filter drawer holder, you will be more convenient to use filters for deep sky photography.Can accommodate 2-inch round, mounted filters, along with other 2-inch round filters that measure 50.8 mm wide and 7.5 mm thick.UHC Telescope Filter Improves Image Contrast of Nebula and Deep Sky Objects.If you're not sure if a light pollution filter will benefit you or not (and it probably will), this SVBONY UHC Filter is a relatively inexpensive way to find out. Best of all, once you have it you'll probably feel no need to pick up a pricier one since this one will likely meet all of your needs.