The magenta filter (#30) is excellent for use in observing Mars. It enhances red features and darkens green features.
For Jupiter observing, it is used to enhance white features.
Using a #30 filter with Saturn will highlight the rings.
For Uranus and Neptune, it is used to enhance the blue-green of the atmosphere.
1.25" Vernonscope Mounted Glass Filters feature 1" clear-aperture optical glass. Numbers are engraved on the mounting to correspond with those of Kodak Wratten series. The mountings are edge-knurled and threaded to fit the bases of BRANDON oculars and DAKIN Barlows. Vernonscope Mounted Glass Filters cut glare, provide superior contrast, improve definition and reduce eye fatigue.