H-alpha/OIII/SII CMOS Ultra-High Speed f/2 2'' Filter for Astrophotography - Baader

The Baader H-alpha/OIII/SII CMOS f/2 Ultra-Highspeed 2'' filter is specially designed for fast CMOS sensors and very bright instruments. It precisely isolates the specific emission lines of nebulae (H-alpha, OIII, and SII), making it ideal for narrowband imaging. Thanks to its design optimized for f/1.8 to f/3.4 systems, this filter ensures high contrast and excellent suppression of bright sky background.FeaturesAdvantagesCompatibilityIncluded ItemsType: Narrowband filterTransmission lines: H-alpha (656.3 nm), OIII (500.7 nm), SII (671.7 nm)Bandwidth: 3.5 nm for H-alpha and SII, 4 nm for OIIIMount: 2'' aluminumFilter thickness: 2 mmOptical coatings: Multilayer anti-reflective and dielectric with Reflex-Blocker™ technologyOptimized for fast optics between f/1.8 and f/3.4Excellent isolation of emission lines for optimal contrastPerfect for nebula photography, without ambient light pollutionPrecise filtering that improves the quality of deep-sky imagesCompatible with CMOS sensorsDesigned for imaging with very fast telescopes (f/1.8 to f/3.4)Not suitable for visual observationH-alpha/OIII/SII 2'' filterAluminum mountProtection box