ALPINE ASTRONOMICAL Baader Dark Blue Colored Bandpass Eyepiece Filter (2")

ALPINE ASTRONOMICAL Baader Dark Blue Colored Bandpass Eyepiece Filter (2")

ALPINE ASTRONOMICAL Baader Dark Blue Colored Bandpass Eyepiece Filter (2")

B&H # ALFCFDB2 MFR # FCFDB-2
ALPINE ASTRONOMICAL Baader Dark Blue Colored Bandpass Eyepiece Filter (2")

ALPINE ASTRONOMICAL Baader Dark Blue Colored Bandpass Eyepiece Filter (2")

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Expected availability: 7-14 business days

Product Highlights

  • Planetary Viewing/Imaging Filter
  • 435nm Wavelength Bandpass
  • 2" Eyepiece Threads
  • 7-Layer Anti-Reflection Multi-Coated
  • No Reflections, Scatter or Image Dimming
  • Planeoptically Polished Optical Glass
  • 70% Throughput Transmission
  • Blackened Aluminum Frame
  • Stackable with Other Filters
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Color: Dark Blue, 435nm

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Size: 2"

1.25"

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2"
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  • 1Description

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.

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
In the Box
ALPINE ASTRONOMICAL Baader Dark Blue Colored Bandpass Eyepiece Filter (2")
  • Plastic Case
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Size 2"
    Filter Factor Dark Blue, 435nm wavelength
    Multi-Coated Yes
    Rotating No
    Application Lunar and planetary viewing and imaging
    Construction Glass filter, aluminum frame
    Front Filter Thread Size 2"
    Weight 2.3 oz / 66.0 g
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