Blocking filters block either short wavelength UV or long wavelength infrared light. There are also filters that block both of these wavelength regions.

Omegon
Blocking Filters Infrared band elimination filter
$ 24.90
ready for shipping in 24
h

Omegon
Blocking Filters 1.25''UV / IR cut-off filter
$ 79.00
ready for shipping in 24
h

Lumicon
Infrared blocking filter 1.25''
Sale price:
$ 214.00
$ 106.37
ready for shipping in 24
h

Baader
Blocking Filters Solar Continuum 1.25"
Our price:
RRP:
$ 128.00
$ 127.00
ready for shipping in 24
h

Baader
Blocking Filters Solar Continuum 2"
$ 213.00
ready for shipping in 1-2
weeks

Celestron
Blocking Filters Skyris IR-Cut Filter 1,25"
$ 41.90
ready for shipping in 1-2
weeks

Astronomik
Blocking Filters Infrared-cutting filter, SC
Sale price:
$ 150.00
$ 106.37
ready for shipping in 24
h

ASToptics
Blocking Filters UV-IR CUTTING FILTER (2")
$ 64.00
ready for shipping in 3-6
months

Astronomik
2'' IR blocking filter
$ 107.00
ready for shipping in 1-2
weeks

Astronomik
Blocking Filters Infrared cutting filter, T2
$ 96.00
ready for shipping in 1-2
weeks

ZWO
Blocking Filters UV/IR 1,25"
$ 86.00
ready for shipping in 24
h

Lumicon
Blocking Filters Minus Violet 1.25''
$ 75.00
Product can be shipped as of 01.09.2023

Artesky
Blocking Filters IR-Cut 2"
$ 72.00
ready for shipping in 3-5
weeks

Lumicon
Blocking Filters Minus Violet 2''
$ 96.00
Product can be shipped as of 01.09.2023

ZWO
Blocking Filters IR-CUT Protect Window ASI D21
Our price:
RRP:
$ 32.90
$ 26.90
ready for shipping in 24
h

DayStar
Blocking Filters UV/IR 2"
$ 204.00
ready for shipping in 6-10
weeks

ZWO
Blocking Filters IR-CUT Protect Window ASI D25
$ 32.90
ready for shipping in 3-5
weeks

Astrodon
Blocking Filters Exoplanet BB 1.25" filter
$ 300.00
Product can be shipped as of 01.09.2023

Astronomik
1.25" IR blocking filter
$ 64.00
ready for shipping in 1-2
weeks

Astrodon
Blocking Filters Exoplanet BB 49.7mm filter, unmounted
$ 472.00
Product can be shipped as of 01.09.2023

Astrodon
Blocking Filters Exoplanet BB 49.7 x 49.7mm filter, unmounted
$ 590.00
Product can be shipped as of 01.09.2023