The ToupTek Filter Holder is a simple threaded filter mount that accepts a standard 1.25" or 2" threaded filter and attaches directly to your camera nose or focuser drawtube. It provides a rigid, secure single-filter position for dedicated narrowband or broadband imaging with a fixed filter configuration. Who Is This Product Best For? Astrophotographers who image with a single fixed filter — such as a dual narrowband Ha+OIII filter or a UV/IR cut — and want a secure, low-profile way to mount it in the optical train without a filter wheel. Why Choose This Product? Threaded connection — filters thread in securely; no risk of accidental rotation or drop 1.25" or 2" compatibility — specify format at order Low profile — minimal back-focus impact CNC aluminium construction Recommended Uses Single fixed-filter setups (dual narrowband, UV/IR cut, light pollution filter) Filter mounting on camera nose pieces and focuser drawtubes Important Limitations Single filter position only — for multi-filter imaging, use the AFW-M or AFW-L filter wheel Our Recommendation The Filter Holder is a cost-effective solution for single-filter setups. Straightforward and reliable — nothing to go wrong.