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
Double pair of magnets; SV226 photographic filters drawer compared with traditional screw rotation; magnet has stronger adsorption force; which is convenient for you to install and use
Two filter holders; compatible with 1.25-inch and 2-inch filters; plug and play; reducing repeated installations in dark environments
Locking function; lock screw can adjust the tension to eliminate the gap; solve the light leaking issue under long exposure; which is a double insurance for you