Use the Alpine Astronomical Baader 685nm IR-Pass Filter to enhance the views and images of planets. Utilizing IR Phantom-Group optical multi-coatings, the filter only allows the narrow long deep red 685nm wavelength to pass through to your eye, minimizing the appearance of atmospheric turbulence during planetary viewing and imaging sessions. Views through the filter reveal dark structures on Mars, Jupiter, and the Moon with enhanced contrast. The filter is set in a 1.25" mount threaded to fit standard eyepieces.
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Key Features
- Ideal for Planetary Viewing and Imaging
- View in the Long Deep-Red Wavelength
- IR Phantom-Group Optical Multi-Coatings
- Passes the Narrow 685nm Bandwidth
Use the Alpine Astronomical Baader 685nm IR-Pass Filter to enhance the views and images of planets. Utilizing IR Phantom-Group optical multi-coatings, the filter only allows the narrow long deep red 685nm wavelength to pass through to your eye, minimizing the appearance of atmospheric turbulence during planetary viewing and imaging sessions. Views through the filter reveal dark structures on Mars, Jupiter, and the Moon with enhanced contrast. The filter is set in a 1.25" mount threaded to fit standard eyepieces.
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Alpine Astronomical FIRP-1 Overview
Alpine Astronomical FIRP-1 Specs
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| Filter Eyepiece Size |
Packaging Info
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Alpine Astronomical FIRP-1 Reviews
Sharp image
By Mike
Rated 5 out of 5
Date: 2022-11-15
Finally got to use this for the first time last weekend on Jupiter. Provided nice, sharp images to combine with my Baader RGB filters
A Must-Have for Night Vision Astronomy!
By John
Rated 5 out of 5
Date: 2022-06-17
I live in heavily light polluted skies, yet I can go out in the backyard and look up at the billowing clouds of the milky way. I can actually see meteorite showers when they are happening. This is all possible by using this filter in conjunction with a Gen3 night vision device. This filter blocks out all light below 685nm which is basically all the man made light pollution leaving mostly celestial light for your enjoyment. This does cut out hydrogen alpha light, so you will not be seeing nebulae with this, but a separate band pass filter is used for that purpose.
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