This variable polarizing filter has a Aluminium material mount; which is sturdy and durable
It helps you to adjust the brightness effectively; the variable polarizing filter allows for selective adjustment of brightness; which is useful for terrestrial observation
These filters have a very large range of effectiveness; Light transmission of polarizing filters is between 1 percent and 40 percent
Really sharp planetary images are only possible using an IR/UV blocking filter; this Astromania filter only allows the visible light between 400 and 780nm through; the UV and IR regions of the spectrum are completely blocked
Sharp Images: A CCD camera is not only sensitive to visible light but to other wavelengths; planets are out of focus in the IR region; the Astromania filters only lets through the visible light; meaning sharp planetary images