Hoya
Hoya 77mm Circular Polarizing and UV HRT Screw-in Filter
Tiffen
Tiffen 52mm Digital HT Multi Coated Circular Polarizer
Celestron
Celestron Variable Polarizing Telescope Filter for Astronomy, Compatible with 1.25" Eyepieces (94107)
RENIAN
Polarized Film Sheets 3 PCS 7.8 x11.8inches/20x30cm Polarizer Linear Polarizing Filter Non-Adhesive for Educational Physics Photography Lighting