Baader Contrast Booster Filter
For users of Achromatic telescopes this filter enhances contrast, making brighter objects appear sharper and more clear.
It does this by reducing the violet & blue secondary spectrum that is that is often seen with achromats.
This filter is a good choice for those who using larger/faster achromats and also reduces the effects of Sodium light pollution.
Another use is for the observation of the Planets, particularly Jupiter and Mars.
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