Chroma SII 8nm Narrowband Filter - 31 mm
ITEM #
CF-SII8-31
- Parfocal for systems f/4.0 or slower
- Transmitted wavefront better than 0.25 waves/inch
- Parallelism: less than 30 arcsec
- Made in the U.S.A.
- H-Alpha 8nm Narrow Band Filter
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Chroma SII 8nm Narrowband Filter - 31 mm
Chroma SII 8nm Narrow Band Filters are essential for imaging objects, like nebulae, that are rich in ionized sulfur atoms. These line emission filters work extremely well in heavy light-polluted areas and allow you image on nights when the moon is up.
SPECIFICATIONS
| Filter Shape | Round |
|---|---|
| Filter Type | SII |
| Free Shipping | Yes |
| Size | 31mm |