Optolong Variable Polarizer Filter 2 Inch 94055 10mm & 20mm Eyepieces and

10mm & 20mm Eyepieces and a Universal Smartphone Adaptor

6 pcs M2x5*6 Screws

Tripod leg diameter: 2"

so it’s perfectly portable and easy to bring on your next camping trip or to a remote observing site

Optolong Variable Polarizer Filter 2 Inch 94055 10mm & 20mm Eyepieces andOptolong Variable Polarizer Filter 1. 25 A variable polarizing Moon filter consists of two single polarizing filters coupled together. One of these has threads to attach to the bottom of eyepieces or other threaded adapter barrels, and the second filter can freely rotate over 360 degrees, thus allowing you to control the brightness of the image over a wide range. You simply rotate the lower filter until the image brightness is pleasing and comfortable