ANTLIA H-beta and OIII Visual and Astrophotography Filter - 1.25"


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ANTLIA H-beta and OIII Visual and Astrophotography Filter - 1.25"

The 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.


The Antlia HB-OIII filter was coated with almost total suppression of optical density (OD4) 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 Oxigen III H-beta
CWL (Central Wavelength) 500.7nm 495.9nm 486.1nm
Peak transmission >90% >90% >90%
Blocking      OD4@ 300-1000nm
Filter Thickness 2mm+/-0.05mm
Basic Substrate Optical, Single, Non-glued substrate
Surface Quality S/D (scratch/dig)= 60/40 (Refer to MIL-O-13830)
Transmitted Wavefront                                    Lambda/4 or better
Parallelism less than 30 arcsec

Sizes and MAP Prices:

Size Minimum Advertised Pricing (MAP)
Mounted: 1.25’’ US$99.00
Other sizes 2’’ Availability and price are to be confirmed


Ultra-thin filter cell to minimize vignetting, Black anodized finish, Laser engraving No fading

Warranty: 3-years against delamination

DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.

ANTLIA H-beta and OIII Visual and Astrophotography Filter - 1.25"