SII 3nm Bandpass optimized for f/2.8-f/3.6


SII 3nm Bandpass optimized for f/2.8-f/3.6

Regular price
$ 575.00
Sale price
$ 575.00
Unit price

This item is a Special Order from the Manufacturer

Special Order


SII filters isolate the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma’s f/3.0 filters are designed to minimize spectral shift and hold their shape better in an f/3.0 beam.

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