Antlia O-III and H-Beta Photo-Visual Filter - 2" Mounted
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Antlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm , and H-Beta 486. 1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.
When it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs.
Main Application and Performance:
Antlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm , it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.
The HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.
Since human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer's eyes.
Technical Specifications:
| Oxygen III | Oxygen III | H-Beta | |
| CWL (Central Wavelength) | 500.7nm | 495.9nm | 486.1nm |
| Peak Transmission | >90% | >90% | >90% |
| Blocking | OD4@ 300-1000nm | OD4@ 300-1000nm | OD4@ 300-1000nm |
| Filter Thickness | 2mm+/-0.05mm | 2mm+/-0.05mm | 2mm+/-0.05mm |
| Basic Substrate | Optical, Single, Non-glued substrate | Optical, Single, Non-glued substrate | Optical, Single, Non-glued substrate |
| Surface Quality | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) |
| Transmitted Wavefront | Lambda/4 or better | Lambda/4 or better | Lambda/4 or better |
| Parallelism | less than 30 arcsec | less than 30 arcsec | less than 30 arcsec |
Filter Ring:
- 1.25’’ (M28.5*0.6)
- 2’’ (M48*0.75)
- Ultra-thin filter cell to minimize vignetting, Black anodized finish, Laser engraving No fading
Not Recommended:
- Solar imaging and observing
Not Permitted:
- DO NOT LOOK AT THE SUN WITH THIS FILTER
- Serious eye damage will result if you fail to observe the warning.
Useful Resources
Filter Cell Specifications
D = Filter Cell Diameter = 50.3 mm / 2.0 in
T = Total Filter Height = 7.3 mm / 0.28 in
C = Filter Cell Height (Excluding Male Thread) = 4.9 mm / 0.19 in
M = Male Thread Length = 2.5 mm / 0.09 in
F = USABLE Female Filter Thread Length = Not threaded, so you cannot stack additional filters
S = Glass Substrate Thickness = 2 mm / 0.07 in
CA = Clear Aperture = 45 mm / 1.77 in
Other Information
- Country of Manufacture: China
Antlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm , and H-Beta 486. 1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.
When it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs.
Main Application and Performance:
Antlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm , it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.
The HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.
Since human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer's eyes.
Technical Specifications:
| Oxygen III | Oxygen III | H-Beta | |
| CWL (Central Wavelength) | 500.7nm | 495.9nm | 486.1nm |
| Peak Transmission | >90% | >90% | >90% |
| Blocking | OD4@ 300-1000nm | OD4@ 300-1000nm | OD4@ 300-1000nm |
| Filter Thickness | 2mm+/-0.05mm | 2mm+/-0.05mm | 2mm+/-0.05mm |
| Basic Substrate | Optical, Single, Non-glued substrate | Optical, Single, Non-glued substrate | Optical, Single, Non-glued substrate |
| Surface Quality | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) |
| Transmitted Wavefront | Lambda/4 or better | Lambda/4 or better | Lambda/4 or better |
| Parallelism | less than 30 arcsec | less than 30 arcsec | less than 30 arcsec |
Filter Ring:
- 1.25’’ (M28.5*0.6)
- 2’’ (M48*0.75)
- Ultra-thin filter cell to minimize vignetting, Black anodized finish, Laser engraving No fading
Not Recommended:
- Solar imaging and observing
Not Permitted:
- DO NOT LOOK AT THE SUN WITH THIS FILTER
- Serious eye damage will result if you fail to observe the warning.
Antlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm , and H-Beta 486. 1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.
When it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs.
Main Application and Performance:
Antlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm , it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.
The HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.
Since human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer's eyes.
Technical Specifications:
| Oxygen III | Oxygen III | H-Beta | |
| CWL (Central Wavelength) | 500.7nm | 495.9nm | 486.1nm |
| Peak Transmission | >90% | >90% | >90% |
| Blocking | OD4@ 300-1000nm | OD4@ 300-1000nm | OD4@ 300-1000nm |
| Filter Thickness | 2mm+/-0.05mm | 2mm+/-0.05mm | 2mm+/-0.05mm |
| Basic Substrate | Optical, Single, Non-glued substrate | Optical, Single, Non-glued substrate | Optical, Single, Non-glued substrate |
| Surface Quality | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) | S/D (scratch/dig) = 60/40 (Refer to MIL-O-13830) |
| Transmitted Wavefront | Lambda/4 or better | Lambda/4 or better | Lambda/4 or better |
| Parallelism | less than 30 arcsec | less than 30 arcsec | less than 30 arcsec |
Filter Ring:
- 1.25’’ (M28.5*0.6)
- 2’’ (M48*0.75)
- Ultra-thin filter cell to minimize vignetting, Black anodized finish, Laser engraving No fading
Not Recommended:
- Solar imaging and observing
Not Permitted:
- DO NOT LOOK AT THE SUN WITH THIS FILTER
- Serious eye damage will result if you fail to observe the warning.
Useful Resources
Filter Cell Specifications
D = Filter Cell Diameter = 50.3 mm / 2.0 in
T = Total Filter Height = 7.3 mm / 0.28 in
C = Filter Cell Height (Excluding Male Thread) = 4.9 mm / 0.19 in
M = Male Thread Length = 2.5 mm / 0.09 in
F = USABLE Female Filter Thread Length = Not threaded, so you cannot stack additional filters
S = Glass Substrate Thickness = 2 mm / 0.07 in
CA = Clear Aperture = 45 mm / 1.77 in
Other Information
- Country of Manufacture: China
| Product Status | new |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
Antlia O-III and H-Beta Photo-Visual Filter - 2" Mounted