Antlia ALP-T Dual Band 5nm Highspeed Filter


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SKU: ALP-T-HS 2inch


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    Antlia ALP-T Dual Band 5nm Highspeed Filter

    Antlia ALP-T Dual Band 5nm Highspeed Filters are optimized to work with high-speed imaging systems

    Antlia ALP-T Dual Band 5nm Highspeed Filters are optimized to work with high-speed imaging systems by shifting slightly the passband and center wavelength. Using these highspeed filters between optics f/2.2 and f/3.6 shows much stronger and more contrasted in nebulae imaging compared to the standard version,  if you seek the best possible performance with any optics faster than f/2.2, the highspeed version is the best choice.

    But keep in mind, the blue shift data by the computer simulation indicates narrowband filter shifts its bandwidth to shorter wavelengths with faster optics than f/2, transmission at the emission wavelength may decrease perhaps 15%-20%. Although the Antlia ALP-T highspeed filter has similar transmission rates reduction in the H-a and OIII when the filter is used on fast optics, based on current standard version users’ data, it is evident that the filter still has the high performance of increase in emission nebula contrast and minimized halo.

    The highspeed version price is the same as the standard filters and double benefits for the high-speed optics users. Worth mentioning is that Antlia inspected and measured products piece by piece with one of Agilent Cary’s professional spectrophotometer, resolution/slit width is up to 0.2nm, which make us provide highly reliable and consistent products to you.

    The Antlia ALP-T dual band 5nm series filter is a dual line-pass filter that was designed to be used primarily with one-shot color (OSC) cameras such as DSLR’s and astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time. The advanced multi-coatings on our ALP-T ultra dual band filter effectively isolate the red Ha and the blue-green OIII lines light 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 our ALP-T dual band 5nm filter creates a superior signal-to-noise ratio and better contrast in your images.

    The filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post-processing efforts to isolate faint details from the background light pollution.

    Application and Performance:

    Designed especially for fast astronomy optics, in particular f-ratios f/2.2 to f/3.6

    Engineered specifically for use with DSLR, CMOS, and CCD color cameras

    Suppression of optical density (OD)4.5 on unwanted wavelengths adds signal-to-noise

    Extremely steep bandpass edges minimize internal reflections

    Ideal flat-top and moderate bandpass reducing spectrum down shifts

    Ion Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter

    Designed to suppress artificial lighting from Bortle scale 1 to Bortle scale 8

    Near IR (NIR) is blocked up to 1050nm

    Technical Specifications:

    Hydrogen-alpha Oxygen III
    FWHM 5nm 5nm
    CWL (Central Wavelength) 657.8nm 502.2nm
    Peak Transmission 88% 82%
    Blocking ≥OD4.5 @ 300-1050nm
    Filter Thickness 2mm+/-0.05mm






    Filter Ring:

    2” (M48*0.75)

    Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture

    Black Anodized Finish

    Laser Engraving No Fading

    Spectrum Curve:

    Not Recommended:

    Solar imaging

    Night visual observation

    Not Permitted:


    Serious eye damage will result if you fail to observe the warning

    Have a question about this product?

      CALL NOW : +61 2 9518 7255 OR EMAIL BELOW

      bintel astronomy experts


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