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SVBONY SV164 dark frame imaging filter ensures your acquired dark frames will be completely free of unwanted stray light and reflections for great results. Pesky camera noise can ruin by leaving distracting bright spots and unwanted fixed patterns on your captured exposures. Dark frame acquisition helps remedy such noise and "hot pixels" by canceling out these disruptive effects during image processing. Standard M28.5 x 0.6mm thread SV164 1.25 inch dark frame imaging filter with standard M28.5 x 0.6mm thread；Works with any device that accepts M28.5 x 0.6mm thread Sturdy construction The filter frame is made of high-grade alumina metal material; which is durable Careful packaging A soft lined foam is placed in the plastic box; your dark frame imaging filter is safe during transportation and storage; the sealed plastic box also protects the filter from dust. Can be used with filter wheel it is very convenient to use with filter wheel that accepts M28.5 * 0.6mm thread；Allows you to quickly switch with other eyepieces Pls note: The filters are not designed for sun observation. Do not look at the sun with filter. You would be blind if you fail to observe the warning. Specification: Type: Dark Frame Imaging Filter Size: 1.25inch Material: Metal Thread: Standard M28.5*0.6mm Net Weight: 6g / 0.2oz Package Includes: 1x SVBONY 1.25" Dark Frame Imaging Filter（Can quickly capture dark frames to optimize photo quality） 1x Sturdy Plastic Case (Keep your dark frame imaging filter safe during transport and storage)