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  • 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.

    Main Application and Performance:

    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

    Filter Ring:

    1.25’’(M28.5*0.6)
    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.

    As authorised dealers for all our products they come with a full manufacturers warranty along with our satisfaction guaranteed, no-questions-asked full refund policy for a full 30 days.

    Please see our returns policy for full details.

    We ship direct from UK warehouses and provide free shipping on all purchases within England, Scotland and Wales (Excluding highlands and Islands)

    We use UPS, DHL, DHL Express, Parcelforce or Royal Mail for all orders.

    Estimated delivery time is displayed at checkout.

    See our shipping policy for more details.

    Should you be outside the free shipping area then please contact us to discuss shipping options as prices vary depending on products and delivery location.

    Got questions? Read through our FAQ list to see if it's answered there! If not, please contact us via this form.

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