Antlia H-beta and OIII Filter for the visual and photography - 1.25" Mounted

$99.00
Article number: Hb-OIII-125
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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

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

 

Filter Ring:

1.25’’(M28.5*0.6)

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

 

Spectrum Curve:

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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.

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