This variable polarizing filter has a Aluminium material mount; which makes it difficult to be broken
It helps you to adjust the brightness effectively; the variable polarizing filter allows for selective adjustment of brightness; which is useful for terrestrial observation and objects of the Solar System
These filters have a very large range of effectiveness; light transmission of polarizing filters is between 1 percent and 40percent
Wide 66-deg apparent field offers expansive views of the moon; star clusters; and the Milky Way; generous 18mm eye relief allows comfortable viewing distance and lets eyeglass wearers see the entire field of view
20mm eyepiece offer wide field of view and superior performance; 5-element design deliver sharp image with good color correction and contrast; aluminum 1.25 inch barrel is internally blackened to eliminate light scattering; thread accept 1.25 inch filter