GSO 1.25" Astro Filter #38A | Dark Blue
This filter rejects red and orange wavelengths.
This makes it suitable for revealing subtle shading in Venus’ upper clouds.
On Mars, it enhances the polar caps and dust storms, if present.
Used on Jupiter it enhances the appearance of the redder belts and the Great Red Spot. Another bonus is when used on bright comets details in the ion tail are enhanced.
The filter has a low light transmission so should only be used on larger telescopes.
Comes in protective case