Alpine Astronomical Baader Dark Blue Colored Bandpass Eyepiece Filter (1.25")

BH #ALFCFDB1 • MFR #FCFDB-1
Alpine Astronomical
Alpine Astronomical Baader Dark Blue Colored Bandpass Eyepiece Filter (1.25")
Key Features
  • Planetary Viewing/Imaging Filter
  • 435nm Wavelength Bandpass
  • 1.25" Eyepiece Threads
  • 7-Layer Anti-Reflection Multi-Coated
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 1.25" eyepieces and other accessories such as diagonals and Barlows.
Special Order
Expected availability: 7-14 business days
$41.00

Alpine Astronomical Baader Dark Blue Colored Bandpass Eyepiece Filter (1.25")

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Alpine Astronomical FCFDB-1 Overview

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

Use

  • 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

Alpine Astronomical FCFDB-1 Specs

Size1.25"
Filter FactorDark Blue, 435nm wavelength
Multi-CoatedYes
RotatingNo
ApplicationLunar and planetary viewing and imaging
ConstructionGlass filter, aluminum frame
Front Filter Thread Size 1.25"
Weight2.1 oz / 59.0 g
Packaging Info
Package Weight0.15 lb
Box Dimensions (LxWxH)3.75 x 3 x 1"
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