Chroma
SII 3nm Bandpass optimized for f/2.8-f/3.6
- Regular price
- $ 575.00
- Sale price
- $ 575.00
- Unit price
- per
This item is a Special Order from the Manufacturer
In Stock
Special Order
Description
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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