Antlia ALP-T Dual Band 5nm Ha&OIII + SII&Hb Golden 2" Filter Set (ALP-T-SET-2)
ALP-T-SET-2
Antlia ALP-T Dual Band 5nm Ha&OIII + SII&Hb Golden 2" Filter Set (ALP-T-SET-2)
ALP-T-SET-2
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Product Description
The Antlia ALP-T dual band Golden 5nm filter is a dual line-pass filter which was designed to be used primarily with one-shot colour (OSC) cameras such as DSLR's or astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time.
Antlia ALP-T Dual Band 5nm Ha&OIII Filter: Dual band filter with a very narrow passband of 5nm in OIII and H-alpha to achieve a higher signal-to-noise ratio. The resulting contrast improvement for OSC is impressive.
Antlia ALP-T Dual Band 5nm SII&Hb Filter: Dual band filter with a very narrow pass band of 5nm H-beta and S-II. This filter is ideal for increasing contrast of nebulae that emit in the sulfur and H-beta range using OSC. It provides additional feature separation and isolation in Hb areas.
The advanced multi-coatings on Antlia ALP-T dual band filters effectively isolates the red, Ha line, blue-green, OIII line, deep red SII and the blue H-beta lines from emission nebulae, with almost total suppression of optical density (OD) 4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that both the ALP-T dual band 5nm Ha&OIII and SII&Hb filter creates a superior signal-to-noise ratio and better contrast in your OSC images.
Specifications
| Model | Hydrogen-alpha | Oxygen III | Sulfur-II | Hydrogen Beta |
| FWHM | 5nm | 5nm | 5nm | 5nm |
| CWL (Central Wavelength) | 656.3nm | 500.7nm | 672.4nm | 486.1nm |
| Peak Transmission | 90% | 82% | 90% | 85% |
| Blocking | ≥OD4.5 @ 300-1100nm | ≥OD4.5 @ 300-1100nm | ≥OD4.5 @ 300-1100nm | ≥OD4.5 @ 300-1100nm |
| Filter Thickness | 2mm+/-0.05mm | 2mm+/-0.05mm | 2mm+/-0.05mm | 2mm+/-0.05mm |
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