Colour Filters

Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. Darkens the maria visible on Mars; and clarifies the Cassini division in Saturn Learn More

Useful on the Moon; Mars; Jupiter; and Saturn; this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. A valuable filter to piggyback with other filters. Learn More

A popular filter for the study of Jupiter and Saturn. Enhances contrast of rilles and festoons in Jupiter`s cloud belts; as well as details of the Red Spot. Brings out detail in Saturn`s belts and polar phenomena. Very useful as a contrast-enhancing lunar Learn More

Use on telescopes 8" aperture and larger to reject blue- and red-toned structures on the surface of Jupiter and thereby increase their contrast relative to lighter parts of the disc. Also use for the enhancement of Saturn Learn More

Excellent for the observation of Martian polar ice caps as well as yellow-tinted dust storms on the Martian surface. Increases contrast of the red and blue regions in Jupiter Learn More

Strongly rejects red; yellow; and green wavelengths; useful for the study of Martian polar cap regions and for the observation of occasional phenomena in the upper atmosphere of Venus. Enhances contrast between the rings of Saturn. Use only on telescopes Learn More

A popular filter for the study of Jupiter`s disc; owing to the filter`s strong rejection of orange and red wavelengths. Increases contrast between the reddish belt structures and enhances detail of the Red Spot. Also useful for the study of isolated pheno Learn More

The #25A filter strongly blocks the transmission of blue and blue-green wavelengths; resulting in very sharply defined contrast between; for example; blue-tinted cloud formations on Jupiter and the lighter-toned features of the disc. Also useful for the d Learn More

On telescopes of 6" aperture and larger the #23A Light Red (25% transmission) does approximately the same functions as the #21 filter; but with stronger contrast and enhancement of marginally defined blue-green surface detail. Useful primarily on Jupiter Learn More