Astro-Tech #15 Deep yellow 1.25" color filter

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$11.95

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This #15 deep yellow Astro-Tech 1.25" eyepiece filter is helpful in improving lunar and Martian contrast in telescopes 8" and larger in aperture, particularly if combined with a polarizing or neutral density filter . . .
Our Product #: ATCF15
 

Product Description

Similar in performance to the #12 medium yellow filter, but more pronounced effect. Its transmission is somewhat better suited to scopes in the 8" and larger aperture range, while the #12 filter's transmission is better suited to 4" to 8" apertures.

Recommended applications for this filter:
Moon - Improves contrast between lunar features of varying brilliance in scopes 6" to 8" and larger, especially when combined with a polarizer or neutral density filter. Venus - Somewhat helpful in revealing low-contrast banding in the thick Venusian cloud cover. Mars - Increases the contrast of polar caps, frost areas, low clouds, and dust storms against the ochre deserts. Also sharpens the boundaries of yellow dust clouds. Jupiter - Useful for darkening atmospheric currents containing low-hue blue tones and enhancing detail in small orange-red zonal features in the belts. Useful for studies of the polar regions. Saturn - Useful for darkening atmospheric currents containing low-hue blue tones and enhancing detail in orange-red zonal features in the belts. Improves the visibility of Cassini's Division in the rings. Neptune and Uranus - Useful for enhancing very subtle dusky features in scopes 10" and larger. Comets - Enhances the definition in comet tails.
67% transmission

Tech Details

Color 15 - Deep Yellow
Weight 1 oz.
Warranty 1 year

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