Meade Red Colour Filter #25A

The 25A filter strongly blocks the transmission of blue and blue-green wavelengths, resulting in ver

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 delineation of the Martian polar ice caps and maria. Because of its relatively low total light transmission the 25A filter should be employed on telescopes of 8` aperture and larger.

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