Astro Engineering 1.25inch Variable Polarising

This variable polarising filter is perfect for controlling brightness when making Lunar or other bri

Astro Engineering 1.25inch Variable Polarising

This variable polarising filter is perfect for controlling brightness when making Lunar or other bright target observations. Two identical polarising filters are mounted one above the other - the front filter is mounted in a smoothly rotating ring. By rotating the first filter the light passing through the stacked pair can be modified anywhere between 1 to 40. The filter is also a very effective way of controlling the image brightness and getting workable exposures when taking webcam or CCD ima

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