ZWO Filter Drawer for Nikon LensNew filter Drawer for Nikon lens New filter Drawer with a thickness of 29mm that can be used for carrying 2 filter and connecting ASI cooled cameras to Nikon Lens. It is compatible with all ASI cameras with 17. 5mm back focus distance (except ASI GT series): 1600 294 183 071 533 2600 6200 2400 It can be used with all ZWO 2 filters, including the duo band filter, narrowband filter, IR cut filter, etc. If you are using 2 filters from third party, then