Sky watcher 125 inch variable polarising filter
The skywatcher 125 inch variable polarising filter is a high quality anodised aluminium optical glass variable polarising filter designed to reduce the amount of light entering your eyepiece you can progressively dim the view when observing a bright object such as the moon or certain planets to a level according to your needs whilst increasing contrast reducing glare and increasing the amount of detail that can be studied the light transmission can be varied from 40 down to as little as