Linienfilter lassen ganz selektiv nur das Licht einer bestimmten Spektrallinie durch. Besonders beliebt sind OIII-, SII- und H-Alpha-Filter.
Die römischen Zahlen III und II bezeichnen dabei den Ionisationsgrad des chemischen Elements, das die Spektrallinie erzeugt. So steht OIII (sprich: "Oh drei") für zweifach ionisierten Sauerstoff und SII für einfach ionisierten Schwefel. OI und SI bezeichnen die elektrisch neutralen Atome.
Linienfilter sind ideal zur visuellen Beobachtung und Fotografie von Emissionsnebeln, Supernova-Überresten und planetarischen Nebeln, da diese Objekte definierte Spektrallinien erzeugen. Sternhaufen und Galaxien hingegen haben ein kontinuierliches Spektrum. Für sie sind Filter zur allgemeinen Unterdrückung der Himmelsaufhellung besser geeignet (CLS- oder UHC-Filter).
![Beispiel eines Emissionslinienspektrums (Quelle: Wikipedia)](/CMS/images/text/glossary/Emissionslinien_Wikipedia.png)
![Omegon Pro OIII CCD Filter 1,25''](/Produktbilder/normal/47292_1/Omegon-Pro-OIII-CCD-Filter-1-25-.jpg)
Omegon
Pro OIII CCD Filter 1,25''
$ 139,-
![Omegon Pro OIII CCD Filter 2''](/Produktbilder/normal/47293_1/Omegon-Pro-OIII-CCD-Filter-2-.jpg)
Omegon
Pro OIII CCD Filter 2''
$ 179,-
![Omegon OIII Filter 1,25"](/Produktbilder/normal/15625_1/Omegon-OIII-Filter-1-25-.jpg)
Omegon
OIII Filter 1,25"
$ 89,-
![Baader Filter OIII CMOS Narrowband 65x65mm](/Produktbilder/normal/70864_1/Baader-Filter-OIII-CMOS-Narrowband-65x65mm.jpg)
Baader
Filter OIII CMOS Narrowband 65x65mm
$ 388,-
![Baader Filter OIII CMOS f/2 Ultra-Highspeed 36mm](/Produktbilder/normal/70937_1/Baader-Filter-OIII-CMOS-f-2-Ultra-Highspeed-36mm.jpg)
Baader
Filter OIII CMOS f/2 Ultra-Highspeed 36mm
$ 346,-
![Baader Filter OIII CMOS f/2 Ultra-Highspeed 50x50mm](/Produktbilder/normal/70940_1/Baader-Filter-OIII-CMOS-f-2-Ultra-Highspeed-50x50mm.jpg)
Baader
Filter OIII CMOS f/2 Ultra-Highspeed 50x50mm
$ 436,-
![Baader Filter OIII CMOS f/2 Ultra-Highspeed 50,4mm](/Produktbilder/normal/70939_1/Baader-Filter-OIII-CMOS-f-2-Ultra-Highspeed-50-4mm.jpg)
Baader
Filter OIII CMOS f/2 Ultra-Highspeed 50,4mm
$ 423,-
![Baader Filter OIII CMOS f/2 Highspeed 36mm](/Produktbilder/normal/70916_1/Baader-Filter-OIII-CMOS-f-2-Highspeed-36mm.jpg)
Baader
Filter OIII CMOS f/2 Highspeed 36mm
$ 189,-
![Omegon OIII Filter 2"](/Produktbilder/normal/15627_1/Omegon-OIII-Filter-2-.jpg)
Omegon
OIII Filter 2"
$ 119,-
![Chroma Filter OIII 31mm ungefasst (3nm)](/Produktbilder/normal/71559_1/Chroma-Filter-OIII-31mm-ungefasst-3nm-.jpg)
Chroma
Filter OIII 31mm ungefasst (3nm)
UVP:
$ 1.080,-
Unser Preis:
$ 710,-
![Baader Filter OIII CMOS f/2 Highspeed 1,25"](/Produktbilder/normal/70914_1/Baader-Filter-OIII-CMOS-f-2-Highspeed-1-25-.jpg)
Baader
Filter OIII CMOS f/2 Highspeed 1,25"
$ 162,-
![Baader Filter OIII CMOS Ultra-Narrowband 50x50mm](/Produktbilder/normal/70884_1/Baader-Filter-OIII-CMOS-Ultra-Narrowband-50x50mm.jpg)
Baader
Filter OIII CMOS Ultra-Narrowband 50x50mm
$ 430,-
![Baader Filter OIII CMOS Narrowband 1,25"](/Produktbilder/normal/70858_1/Baader-Filter-OIII-CMOS-Narrowband-1-25-.jpg)
Baader
Filter OIII CMOS Narrowband 1,25"
$ 149,-
![Baader Filter OIII CMOS Ultra-Narrowband 50,4mm](/Produktbilder/normal/70883_1/Baader-Filter-OIII-CMOS-Ultra-Narrowband-50-4mm.jpg)
Baader
Filter OIII CMOS Ultra-Narrowband 50,4mm
$ 420,-
![Baader Filter OIII CMOS Ultra-Narrowband 2"](/Produktbilder/normal/70882_1/Baader-Filter-OIII-CMOS-Ultra-Narrowband-2-.jpg)
Baader
Filter OIII CMOS Ultra-Narrowband 2"
$ 390,-
![Baader Filter OIII CMOS Narrowband 31mm](/Produktbilder/normal/70859_1/Baader-Filter-OIII-CMOS-Narrowband-31mm.jpg)
Baader
Filter OIII CMOS Narrowband 31mm
$ 156,-
![Baader Filter OIII CMOS Ultra-Narrowband 31mm](/Produktbilder/normal/70880_1/Baader-Filter-OIII-CMOS-Ultra-Narrowband-31mm.jpg)
Baader
Filter OIII CMOS Ultra-Narrowband 31mm
$ 287,-
![Baader Filter OIII CMOS Ultra-Narrowband 1,25"](/Produktbilder/normal/70879_1/Baader-Filter-OIII-CMOS-Ultra-Narrowband-1-25-.jpg)
Baader
Filter OIII CMOS Ultra-Narrowband 1,25"
$ 267,-
![Baader Filter OIII CMOS Narrowband 50,4mm](/Produktbilder/normal/70862_1/Baader-Filter-OIII-CMOS-Narrowband-50-4mm.jpg)
Baader
Filter OIII CMOS Narrowband 50,4mm
$ 300,-
![Baader Filter OIII CMOS Narrowband 36mm](/Produktbilder/normal/70860_1/Baader-Filter-OIII-CMOS-Narrowband-36mm.jpg)
Baader
Filter OIII CMOS Narrowband 36mm
$ 179,-
![Baader Filter OIII CMOS f/2 Ultra-Highspeed 1,25"](/Produktbilder/normal/70935_1/Baader-Filter-OIII-CMOS-f-2-Ultra-Highspeed-1-25-.jpg)
Baader
Filter OIII CMOS f/2 Ultra-Highspeed 1,25"
$ 275,-
![Baader Filter OIII CMOS Ultra-Narrowband 65x65mm](/Produktbilder/normal/70885_1/Baader-Filter-OIII-CMOS-Ultra-Narrowband-65x65mm.jpg)
Baader
Filter OIII CMOS Ultra-Narrowband 65x65mm
$ 580,-
![Baader Filter OIII CMOS Narrowband 2"](/Produktbilder/normal/70861_1/Baader-Filter-OIII-CMOS-Narrowband-2-.jpg)
Baader
Filter OIII CMOS Narrowband 2"
$ 251,-
![Baader Filter OIII CMOS f/2 Highspeed 2"](/Produktbilder/normal/70917_1/Baader-Filter-OIII-CMOS-f-2-Highspeed-2-.jpg)
Baader
Filter OIII CMOS f/2 Highspeed 2"
$ 266,-
![Baader Filter OIII CMOS f/2 Ultra-Highspeed 2"](/Produktbilder/normal/70938_1/Baader-Filter-OIII-CMOS-f-2-Ultra-Highspeed-2-.jpg)
Baader
Filter OIII CMOS f/2 Ultra-Highspeed 2"
$ 392,-
![Baader Filter OIII CMOS f/2 Ultra-Highspeed 65x65mm](/Produktbilder/normal/70941_1/Baader-Filter-OIII-CMOS-f-2-Ultra-Highspeed-65x65mm.jpg)
Baader
Filter OIII CMOS f/2 Ultra-Highspeed 65x65mm
$ 580,-
![Astronomik Filter OIII 6nm CCD MaxFR 36mm](/Produktbilder/normal/67073_1/Astronomik-Filter-OIII-6nm-CCD-MaxFR-36mm.jpg)
Astronomik
Filter OIII 6nm CCD MaxFR 36mm
$ 436,-
![Chroma Filter OIII 36mm ungefasst, 3nm](/Produktbilder/normal/68953_1/Chroma-Filter-OIII-36mm-ungefasst-3nm.jpg)
Chroma
Filter OIII 36mm ungefasst, 3nm
$ 930,-
![Astronomik Filter OIII 6nm CCD MaxFR 2"](/Produktbilder/normal/67066_1/Astronomik-Filter-OIII-6nm-CCD-MaxFR-2-.jpg)
Astronomik
Filter OIII 6nm CCD MaxFR 2"
$ 750,-
![Astronomik Filter OIII 6nm CCD MaxFR 1,25"](/Produktbilder/normal/67065_1/Astronomik-Filter-OIII-6nm-CCD-MaxFR-1-25-.jpg)
Astronomik
Filter OIII 6nm CCD MaxFR 1,25"
$ 294,-
![Explore Scientific Filter OIII 2"](/Produktbilder/normal/54041_1/Explore-Scientific-Filter-OIII-2-.jpg)
Explore Scientific
Filter OIII 2"
$ 119,-
![Astronomik Filter OIII 12nm CCD MaxFR Clip Canon EOS XL](/Produktbilder/normal/67054_1/Astronomik-Filter-OIII-12nm-CCD-MaxFR-Clip-Canon-EOS-XL.jpg)
Astronomik
Filter OIII 12nm CCD MaxFR Clip Canon EOS XL
$ 468,-
![Astronomik Filter OIII 12nm CCD MaxFR Clip Canon EOS APS-C](/Produktbilder/normal/67053_1/Astronomik-Filter-OIII-12nm-CCD-MaxFR-Clip-Canon-EOS-APS-C.jpg)
Astronomik
Filter OIII 12nm CCD MaxFR Clip Canon EOS APS-C
$ 272,-
![Astronomik Filter OIII 12nm CCD MaxFR 2"](/Produktbilder/normal/67052_1/Astronomik-Filter-OIII-12nm-CCD-MaxFR-2-.jpg)
Astronomik
Filter OIII 12nm CCD MaxFR 2"
$ 436,-
![Astronomik Filter OIII 12nm CCD MaxFR 1,25"](/Produktbilder/normal/67051_2/Astronomik-Filter-OIII-12nm-CCD-MaxFR-1-25-.jpg)
Astronomik
Filter OIII 12nm CCD MaxFR 1,25"
$ 196,-
![Astronomik Filter OIII 6nm CCD MaxFR Clip Canon EOS XL](/Produktbilder/normal/67068_1/Astronomik-Filter-OIII-6nm-CCD-MaxFR-Clip-Canon-EOS-XL.jpg)