With the Alpine Astronomical Baader Colored Bandpass Eyepiece Filter Set you get all six of their filters for enhanced viewing and imaging the moon and planets. All filters in this set are made to fit larger 2" eyepieces and other accessories, such as diagonals and Barlows, to provide full-frame coverage of imaging sensors and a more comfortable viewing experience versus the smaller 1.25" versions. Each of the filters—blue, dark blue, green, red, orange, and yellow—has a specific purpose and use depending on what feature or features you want to highlight on the moon or any given planet.
Centered on the 470nm wavelength, the Alpine Astronomical Baader Blue Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing or imaging comets or planets such as Venus, Mars, Jupiter, and Saturn. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.
- For visual and photographic planetary use
- Observe high clouds on Mars, enhances contrast of hazes on terminator of Mars
- Appears to make reddish structures darker—ideal for observing the Great Red Spot on Jupiter
- Shows Saturn rings better
- Monitor the structures in the atmosphere of Venus
- Highlights the fine details in gas tails produced by comets
- 70% average transmission bandpass throughput
Centered on the 435nm wavelength, the Alpine Astronomical Baader Dark Blue Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing or imaging planets such as Venus, Mars, Jupiter, and Saturn. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.
- For visual and photographic planetary use
- Aids in better detection of Venus phase
- Improves view of the Violet Clearing on Mars
- Enhances the Great Red Spot on Jupiter and contrast between the belts
- Enhances the contrast between zones on Saturn
- 70% average transmission bandpass throughput
Centered on the 500nm wavelength, the Alpine Astronomical Baader Green Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing the moon or planets such as Mars, Jupiter, and Saturn. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.
- Provides the sharpest images with achromatic refractors
- Improves the visibility of CO2 hoarfrost and ground fog on Mars
- Increases contrast between red and blue regions on Jupiter and Saturn
- Provides the best contrast for lunar craters Tyco, Copernicus, and Kepler
- 70% average transmission bandpass throughput
Centered on the 570nm wavelength, the Alpine Astronomical Baader Orange Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing planets such as Mars, Jupiter, and Saturn or during daytime viewing of the moon, Mercury, and Venus. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.
- Enhances contrast of lunar and planetary observations at dusk
- Improves the detection of dark areas on Mars and penetrates the hazy Martian atmosphere
- Reveals detail in the cloud bands of Jupiter and Saturn
- Well suited for daytime observations of the Moon, Mercury, and Venus
- 98% average transmission bandpass throughput
Centered on the 610nm wavelength, the Alpine Astronomical Baader Red Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing all of the planets and especially Jupiter, Saturn, and Mars. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.
- Steep absorption edge
- Blue and green wavelengths are almost completely blocked, increasing contrast between the light and dark bands on Jupiter and Saturn
- Most interesting filter to use for observing the polar caps of Mars
- An ideal filter for daily observation of all the planets
- 98% average transmission bandpass throughput
Centered on the 495nm wavelength, the Alpine Astronomical Baader Yellow Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing or imaging Jupiter or Mars. The optical glass filter is planeoptically polished and treated with seven-layer Phantom Group anti-reflection multi-coatings to improve contrast and clarity while eliminating reflections, scattering, or image dimming. Holding the filter is an black anodized aluminum frame made to fit standard 2" eyepieces and other accessories such as diagonals and Barlows.
- Suppresses the secondary blue spectrum when using achromatic and half-apochromatic refractors, increasing image sharpness
- For visual and photographic planetary observations
- Enhances contrast between the belts on Jupiter
- Increases contrast of the lunar and Martian surface
- 98% average transmission bandpass throughput