Baader Filters C-ERF energy guard filter 135mm, IR CUT, dielectrically coats (10921)
2976.35 zł
Tax included
These discs are precision-optically polished to lambda/10 on both surfaces. They feature an infrared antireflection coating (dielectric interference coating system with multiple individual layers) that prevents heat from penetrating the telescope's OTA. The plano-parallel D-ERF filter effectively blocks infrared (IR) heat radiation, even during extended observation sessions.