Alpine Astronomical Baader 3.0 Neutral Density Filter (1.25")

BH #ALFND31 • MFR #FND3-1
Alpine Astronomical
Alpine Astronomical Baader 3.0 Neutral Density Filter (1.25")
Key Features
  • Ideal for Lunar Observation
  • Phantom Group Optical Coatings
  • Fits 1.25" Eyepieces and Accessories
  • 3.0 Optical Density
Use the Alpine Astronomical Baader 3.0 Neutral Density Filter to reduce the amount of light coming into your eye during lunar observation and improve the view and contrast. The lens surfaces are fully multi-coated with Phantom Group seven-layer optical coatings. This maximizes light transmission across the entire visual spectrum, stepping down the light throughput while maintaining color-neutral views without reflections, ghosting, or stray interference light.
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Alpine Astronomical FND3-1 Overview

Use the Alpine Astronomical Baader 3.0 Neutral Density Filter to reduce the amount of light coming into your eye during lunar observation and improve the view and contrast. The lens surfaces are fully multi-coated with Phantom Group seven-layer optical coatings. This maximizes light transmission across the entire visual spectrum, stepping down the light throughput while maintaining color-neutral views without reflections, ghosting, or stray interference light.

Its housing is made to fit most 1.25" eyepieces and has female threads for stacking it with other ND and colored filters to further improve views when observing planets and other objects. This iteration of the ND filter line has an optical density of 3.0, with 0.1% transmission and a reduction factor of 1000—making it ideal for viewing and photographing the moon when it's full and very bright.

The filter can also improve solar viewing, but only as a secondary pre-filter stacked with a primary dedicated solar filter. Failure to use a dedicated solar filter may result in permanent eye damage up to and including blindness.

Alpine Astronomical FND3-1 Specs

TypeNeutral density
Size1.25"
Optical Density3.0
Transmission0.1%
IR Reduction Filter1000
Multi-Coatedyes
ApplicationPrimary lunar
Pre-filter for solar viewing
Weight2.1 oz / 59.0 g
Packaging Info
Package Weight0.14 lb
Box Dimensions (LxWxH)3.6 x 3.1 x 1.15"

Alpine Astronomical FND3-1 Reviews

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Is this filters that make planets less bright?

Is this filters that make planets less bright?
Asked by: david
The Alpine Astronomical Baader 3.0 Neutral Density Filter is used to reduce the amount of light coming into your eye during lunar observation and improve the view and contrast. It is not made for planetary use.
Answered by: Dan
Date published: 2019-07-23
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