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Pass filters block out the visible light and allow only long-wave infrared (IR) or short-wave UV light.

IR pass filters are popular in planetary photography, as the seeing conditions due to the terrestrial atmosphere are not so problematic in the long wavelength range. This will hence result in a sharper image than in visible light as long as the camera sensor is sensitive to this long wavelength range.

Pass filters allow only light of a certain wavelength range to pass through. This bandpass range for astrometric filters is very precisely defined. Unlike line filters, the bandpass range is much wider and not matched to a specific spectral line. The aim of an astrometric pass filter is not to suppress light pollution, such filters can be found under the CLS or UHC categories.

The term pass filter is also used to mean filters that allow long-wave infrared (IR) or short-wave UV light to pass through, but not the light visible to the eye. IR pass filters are popular in planetary photography because the disturbance caused by the terrestrial atmosphere’s seeing is not so noticeable in the long-wave range. If the camera sensor is sensitive to this long-wave range, a sharper image is possible than in the visible wavelength range.

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Baader Filters 2 ' IR - passport filter (685 Nm) (flat-optically polished)
Baader
Filters 2 ' IR - passport filter (685 Nm) (flat-optically polished)
$ 156.00
ready for shipping in 1-2 weeks
Baader Filters 1 ¼ ' IR - passport filter (685 Nm) (flat-optically polished)
Baader
Filters 1 ¼ ' IR - passport filter (685 Nm) (flat-optically polished)
( 5 / 5 )
$ 98.00
ready for shipping in 1-2 weeks
Astronomik Filters Planet pro 1.25" IR 742 filter
Astronomik
Filters Planet pro 1.25" IR 742 filter
$ 65.00
ready for shipping in 24 h
Astronomik Filters ProPlanet 742 2" IR band-pass filter
Astronomik
Filters ProPlanet 742 2" IR band-pass filter
$ 130.00
ready for shipping in 3-7 days
Astronomik Filters ProPlanet 642 BP 1.25" IR pass filter
Astronomik
Filters ProPlanet 642 BP 1.25" IR pass filter
$ 86.00
ready for shipping in 3-7 days
Baader Filters UBVRI Bessel R 1.25"
Baader
Filters UBVRI Bessel R 1.25"
$ 151.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel B 1.25"
Baader
Filters UBVRI Bessel B 1.25"
$ 152.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel U 1.25"
Baader
Filters UBVRI Bessel U 1.25"
$ 172.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel V 1.25"
Baader
Filters UBVRI Bessel V 1.25"
$ 154.00
ready for shipping in 1-2 weeks
STC Filters Infrarot Clip-Filter 850nm Sony
STC
Filters Infrarot Clip-Filter 850nm Sony
$ 173.00
ready for shipping in 3-5 weeks
Astronomik Filters ProPlanet 807 1.25" IR bandpass filter
Astronomik
Filters ProPlanet 807 1.25" IR bandpass filter
$ 65.00
ready for shipping in 3-7 days
STC Filters Infrarot Clip-Filter 720nm Sony
STC
Filters Infrarot Clip-Filter 720nm Sony
$ 173.00
ready for shipping in 3-5 weeks
Optolong Filters Clear Focusing 2"
Optolong
Filters Clear Focusing 2"
$ 75.00
ready for shipping in 24 h
STC Filters Infrarot Clip-Filter 590nm Sony
STC
Filters Infrarot Clip-Filter 590nm Sony
$ 173.00
ready for shipping in 3-5 weeks
Baader Filters UBVRI Bessel R 50x50mm
Baader
Filters UBVRI Bessel R 50x50mm
$ 260.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel I 50x50mm
Baader
Filters UBVRI Bessel I 50x50mm
$ 311.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel U 65x65mm
Baader
Filters UBVRI Bessel U 65x65mm
$ 364.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel V 50x50mm
Baader
Filters UBVRI Bessel V 50x50mm
$ 262.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel B 50x50mm
Baader
Filters UBVRI Bessel B 50x50mm
$ 261.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel U 50x50mm
Baader
Filters UBVRI Bessel U 50x50mm
$ 310.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel I 50.4mm
Baader
Filters UBVRI Bessel I 50.4mm
$ 300.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel R 50.4mm
Baader
Filters UBVRI Bessel R 50.4mm
$ 234.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel V 50.4mm
Baader
Filters UBVRI Bessel V 50.4mm
$ 238.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel B 50.4mm
Baader
Filters UBVRI Bessel B 50.4mm
$ 236.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel U 50.4mm
Baader
Filters UBVRI Bessel U 50.4mm
$ 299.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel I 2"
Baader
Filters UBVRI Bessel I 2"
$ 277.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel B 65x65mm
Baader
Filters UBVRI Bessel B 65x65mm
$ 316.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel photometric SET 1.25"
Baader
Filters UBVRI Bessel photometric SET 1.25"
$ 760.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel I 65x65mm
Baader
Filters UBVRI Bessel I 65x65mm
$ 364.00
ready for shipping in 1-2 weeks
Hutech Astro Filters Sightron IR 640 Pro II 2"
Hutech Astro
Filters Sightron IR 640 Pro II 2"
$ 108.00
ready for shipping in 3-5 weeks
Hutech Astro Filters Sightron IR 640 Pro II 1.25"
Hutech Astro
Filters Sightron IR 640 Pro II 1.25"
$ 86.00
ready for shipping in 3-5 weeks
Hutech Astro Filters Sightron IR 800 Pro 1.25"
Hutech Astro
Filters Sightron IR 800 Pro 1.25"
$ 86.00
ready for shipping in 3-5 weeks
Hutech Astro Filters Sightron IR 720 Pro 1.25"
Hutech Astro
Filters Sightron IR 720 Pro 1.25"
$ 86.00
ready for shipping in 3-5 weeks
Baader Filters UBVRI Bessel I 100x100mm
Baader
Filters UBVRI Bessel I 100x100mm
$ 780.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel R 100x100mm
Baader
Filters UBVRI Bessel R 100x100mm
$ 740.00
ready for shipping in 1-2 weeks
Baader Filters UBVRI Bessel V 100x100mm
Baader
Filters UBVRI Bessel V 100x100mm
$ 730.00
ready for shipping in 1-2 weeks