Capture dark frames promptly to enhance photo quality; SV164 filter restricts all light from sensors; aid in reducing camera noise and hot pixels; particularly for improved astrophotography images.
SV220 dual band filter can reduce the light pollution; enhance the contrast when imaging nebulae
For deep sky photography; use the dual-band filter to enable deep-sky photography in light-polluted cities or under a full moon
2 inch standard filter; SV164 dark frame imagin filter size is 2 inches; you can freely match all your equipment that accept standard 2 inch filter
Various combinations; for example; the thread of the SV164 dark frame imagin filter can be directly connected to the filter wheel; Allows you to quickly switch between different filters; very convenient