These filters are built for SBIG to our exacting specifications. All filters are parfocal, which avoids unnecessary refocusing. They are typically 3mm thick, and 50.8mm in diameter.
Filters and filter set available include:
- Luminance (L)
- Red (R)
- Green (G)
- Blue (B)
- Clear (C)
- Hydrogen Alpha (Ha) – 656.3 nm, bandwidth 6.5 nm
- Sulphur II (SII) – 672.4 nm, bandwidth 6.5 nm
- Oxygen III (OIII) – 500.7 nm, bandwidth 6.5 nm
- LRGB Color Imaging Package (four filters)
- Narrowband Package – Ha, SII, OIII (three filters)
- Deep Sky Package – L, R, G, B, Ha, SII, OIII (seven filters)
Clear passes all wavelengths but is parfocal with the other filters.
Spectral response for LRGB filters
All filters are 3 mm thick, and 50.8mm in diameter.
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50mm Round Optical Filters
|
SBIG Filters |
DESCRIPTION |
|
50mm round unmounted (STXL) |
|
|
FL-50-RND-NB3 (was 50-3508NBB) |
50mm-round Narrowband Package-3-filters-ha-sii-oiii |
|
FL-50-RND-NB4 (was 50-4508NBB) |
50mm-round Narrowband Package-4-filters-ha-sii-oiii-hb |
|
FL-50-RND-LRGB (was 50-4508CIB) |
50mm-round-LRGB Package |
|
FL-50-RND-DS |
50mm round Deep Sky Package LRGB + Ha + SII + OIII |
|
51828 |
50mm round Ha |
|
51829 |
50mm round Hb |
|
51830 |
50mm round SII |
|
51831 |
50mm round OIII |
|
51880 |
50mm-round-uv-ir-cut-filter |
|
51881 |
50mm-round-clear-ir-cut-filter |
|
51882 |
50mm round red |
|
51883 |
50mm round green |
|
51884 |
50mm round blue |