SVBONY F9147A 1.25 inch Adjustable Polarizer CPL Filter

1. Rotate the filter housing to adjust the light transmission from 1 to 40 percent
2. Reduces the brightness of the Moon or planets for a clear field of view
3. Provides better control of image brightness than standard fixed transmission telescope filters
4. Material: optical glass lens + aluminum frame
5. Diameter: 1.25 inch
6. Net weight: about 13g
7. Glass material thickness: about 2.4mm