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Chroma SII 3nm 2" narrow band filter
CHR66093
Stock at Supplier
1,583.43
1,632.23
-48.80
VAT excluded
Shipping 5/7d
SII filter: the narrow-band filter only lets through light from ionized sulfur atoms at 672 nanometers, which is the line at which many planetary nebulae, emission nebulae and supernova remnants are illuminated.
Delivery Options
| Carrier | Description | Estimated Delivery | ||
|---|---|---|---|---|
 |
Home delivery - International | Home delivery - International |
Monday, 9 December - Monday, 16 December |
|
Home delivery - International
Home delivery - International
Estimated delivery:
Monday, 9 December - Monday, 16 December
✖
PRODUCT DESCRIPTION
SII filters isolate the spectral emission from singly ionized sulfur atoms, also common in nebulae. The emission occurs in two lines that form a doublet, at 671.6 and 673.1 nm. This filter also separates the sulfur emission from the H-alpha emission (656.3 nm).
SPECIFICATIONS
Capacity
- Connection (telescope side): 2"
- Frame: 2"
- Support material: Aluminum
- Center axis length (nm): 672
- Width at mid-height (nm): 3
General
- Type: Filter
- Construction type: Line filter
Applications
- Planetary nebulae: yes
- Supernova remnants: yes
- Suitable for photographic purposes: yes
- Against light pollution: yes
All transmission and blocking (OD) data are actual spectra measured from representative production batches. Spectra vary slightly from batch to batch. OD values above 6 may appear noisy because such evaluations push the resolution limit of low light level measurements.
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