Meade # 905 Variable Polarising filter

Meade variable polarising filter: Includes two filters
This Meade variable polarising filter can continuously filter out excessive light. This increases the contrast for bright objects like the moon. Very easy to control by rotating the filters relative to each each other through external buttons.

Light transmission: between 5 and 25%
The Meade # 905 polarising filter lets you continuously adjust the light transmission to your needs; you can do this between 5 and 25%. This is ideal to counteract the lighting conditions of the moon or to take into account the different magnifications or difference in aperture of your telescope.

How does it work?
The Meade polarising filter is placed in the diagonal prism of the telescope, then you screw an eyepiece (1.25 inch) in the polarising filter. The polarising filter basically works like a pair of sunglasses for your telescope. You can also counter a bright nebula or the strong light of the moon. The big advantage of a variable polarising filter over a standard filter is that with a standard filter the eyepiece needs to be removed from the telescope every time. This is not necessary with a variable polarisation filter.