Optolong UHC Ultra High Contrast Filter 77mm Mounted - OPT-UHC-77MM
1,25'' UHC-Filter, Deep Sky-Filter, Nebelfilter, Deep Sky-Filter für Teleskopokulare, 1,25-Zoll-Farbfilter für astronomische Mondnebel-Planetensonnen-Teleskope: Amazon.de: Elektronik & Foto
Test: UHC filter on an unmodded 5d3 (M42) - Beginning Deep Sky Imaging - Cloudy Nights
Lumicon UHC Filter Review | An Astrophotography Nebula Filter