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The Astronomik 6 nm OIII CCD  filter 2" is an extremely narrow emission-line filter for CCD photography
The Astronomik 6 nm OIII CCD  filter Clip EOS APS-C is an extremely narrow emission-line filter for CCD photography
The Astronomik 6 nm OIII CCD  filter Clip Filter EOS XL is an extremely narrow emission-line filter for CCD photography
Astronomik SII CCD Filter, 12 nm, Clip-Filter EOS XL
Astronomik SII CCD Filter, 12 nm, 1.25 inch mounted
Astronomik SII CCD Filter, 12 nm, 2 inch mounted
Astronomik SII CCD Filter, 12 nm, Clip-Filter EOS APS-C
Astronomik SII CCD Filter, 6 nm, Clip-Filter EOS XL
Astronomik SII CCD Filter, 6 nm, 1.25 inch mounted
Astronomik SII CCD Filter, 6 nm, 2 inch mounted
Astronomik SII CCD Filter, 6 nm, Clip-Filter EOS APS-C
High quality Astronomik UHC filter - also for smaller telescopes from 80 mm onwards.