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 1.25" eyepieces and other accessories such as diagonals and Barlows.
Use
- 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