saxon Colour Planetary Filter No.25A – Red (1.25")

Unlock fine planetary detail with the saxon Colour Planetary Filter No.25A – Red (1.25"), designed to deliver sharply enhanced contrast by strongly blocking blue and green wavelengths. This deep red filter is particularly effective on Jupiter, revealing crisp distinctions between its blue cloud bands and lighter surface zones.

It also excels in enhancing views of Mars, improving visibility of polar ice caps and surface features like the maria. While powerful, its reduced light transmission makes it best suited for telescopes with apertures of 8 inches (200 mm) or larger.

A favourite for Venus and Mercury observations, this filter cuts glare on Venus to reveal subtle cloud structures, and reduces sky brightness on Mercury for improved contrast during daylight or twilight sessions.

Key Features:

• 1.25" threaded filter compatible with standard eyepieces
• Strongly blocks blue & green wavelengths for high contrast
• Reveals Jupiter’s blue cloud bands and surface zones
• Enhances Mars’ polar ice caps and maria visibility
• Sharpens Venus cloud structures and cuts glare
• Improves Mercury contrast by reducing sky brightness
• Best for telescopes with apertures of 8 inches (200 mm) or larger