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Astronomik UHC Visual Filters

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  1. micro line

    FLI - Microline Liquid Cooling Option with Double Shut-Off

    FLI - Microline Liquid Cooling Option with Double Shut-Off ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: LC-DS
    $389.00

  2. Lunt Solar Systems 100mm H-Alpha Filter - w/ B1800 for 1.5" Focusers

    Lunt Solar Systems 100mm H-Alpha Filter - w/ B1800 for 1.5" Focusers

    The new Lunt Solar Systems LS100 Hydrogen-Alpha Filter incorporates a unique design feature ... Learn More
    Model#: LS100FHa1_B1800
    $5,744.00

  3. TeleGizmos Standard Solar Scope Cover for Meade 12" LightBridge Dobsonian

    TeleGizmos Standard Solar Scope Cover for Meade 12" LightBridge Dobsonian

    The new TeleGizmos Solar Telescope Cover is made from multi-layer ... Learn More
    Model#: TGLB-12
    $89.00

  4. Astrodon - 50mm Gen 2 Unmounted Square G' Filter

    Astrodon - 50mm Gen 2 Unmounted Square G' Filter

    Astrodon's new improvements of photometric Sloan filters generation 2 feature excellent out of band clocking and other edge-blackended compounds to reduce stray light reflections to assist in CCD imaging.

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: g'2_50S
    $390.00

  5. Astronomik - Dark Filter - 1.25"

    Astronomik - Dark Filter - 1.25"

    Do you have a CCD camera without a mechanical shutter and would like to do dark frames without continually monitoring your equipment?

    ...     Learn More
    Model#: DARK-1
    $39.95

  6. Borg - 71 ED II f/4.3 Astrograph Set (2178 + 7135 + 7835 + 7704)

    Borg - 71 ED II f/4.3 Astrograph Set (2178 + 7135 + 7835 + 7704)

    • BORG 77EDII OTA
    • 0.65x reducer
    • Total of 6 elements
    • 330mm focal length
    • F4.3
    • 35mm full-frame coverage
    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: B07743
    $2,175.00

  7. carbon12 - Celestron NexStar / CGE RS-232 Serial Cable (Coiled) for Sky-Fi & StarSeek

    carbon12 - Celestron NexStar / CGE RS-232 Serial Cable (Coiled) for Sky-Fi & StarSeek

    Avoid extra cables and RS-232 plugs by using the Custom Celestron CGE, made specifically for using SkyFi & Starseek Wi-Fi setup with the Celestron NexStar Hand Controller. ... Learn More
    Model#: CGE-SFC
    $32.95

  8. carbon12 - Meade ETX, LX – RS-232 Serial Cable for Sky-Fi and Starseek

    carbon12 - Meade ETX, LX – RS-232 Serial Cable for Sky-Fi and Starseek

    Avoid extra cables and RS-232 plugs by using the Custom Meade ETX Series, LX-90, LXD55/75 to Sky-Fi Serial Cable. This cable is made specifically for using a Sky-Fi or Starseek Wi-Fi setup with the Meade ETX-90AT, Meade ETX-105AT, Meade ETX-125AT, LXD55/75 and LX-90 telescopes utilizing the AutoStar 497 Handset. ... Learn More
    Model#: ETX-SFC
    $32.95

  9. ServoCAT-S

    carbon12 - ServoCAT & ServoCAT Jr. – ( Straight 18") RS-232 Serial Cable for Sky-Fi and Starseek

    Avoid extra cables and RS-232 plugs by using the Custom ServoCat to Sky-Fi Cable, made specifically for using Sky-Fi & Starseek Wi-Fi setup with ServoCat Gen 1 & 2 using Argo Navis© GoTo. ... Learn More
    Model#: ServoCAT-S
    $32.95

  10. carbon12 - ServoCAT & ServoCAT Jr. – (Coiled) RS-232 Serial Cable for Sky-Fi and Starseek

    carbon12 - ServoCAT & ServoCAT Jr. – (Coiled) RS-232 Serial Cable for Sky-Fi and Starseek

    Avoid extra cables and RS-232 plugs by using the Custom ServoCat to Sky-Fi Cable, made specifically for using Sky-Fi & Starseek Wi-Fi setup with ServoCat Gen 1 & 2 using Argo Navis© GoTo. ... Learn More
    Model#: ServoCAT
    $34.95

  11. carbon12 - Starmaster RS-232 Serial Cable (Coiled) for Sky-Fi and Starseek

    carbon12 - Starmaster RS-232 Serial Cable (Coiled) for Sky-Fi and Starseek

    Avoid extra cables and RS-232 plugs by using the Custom Starmaster to Sky-Fi Cable. The one cable made specifically for using Sky-Fi & Starseek Wi-Fi setup with Starmaster using StarTrack and Sky Commander GoTo. ... Learn More
    Model#: SM-SFC
    $32.95

  12. carbon12 - Starmaster RS-232 Serial Cable (Straight) for Sky-Fi and Starseek

    carbon12 - Starmaster RS-232 Serial Cable (Straight) for Sky-Fi and Starseek

    Avoid extra cables and RS-232 plugs by using the Custom Starmaster to Sky-Fi Cable. The one cable made specifically for using Sky-Fi & Starseek Wi-Fi setup with Starmaster using StarTrack and Sky Commander GoTo. ... Learn More
    Model#: SM-SFS
    $32.95

  13. carbon12 - Takahashi RS-232 Serial Cable for Sky-Fi and Starseek

    carbon12 - Takahashi RS-232 Serial Cable for Sky-Fi and Starseek

    Avoid extra cables and RS-232 plugs by using the Custom Takahashi to Sky-Fi Cable. The one cable made specifically for using Sky-Fi & Starseek Wi-Fi setup with Takahashi Mounts: EM-200, EM-200 Jr., EM11, NJP, EM400 & EM500. ... Learn More
    Model#: TAK-SFC
    $59.95

  14. Explore Scientific - 9mm 120° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    Explore Scientific - 9mm 120° Series Argon-Purged Waterproof Eyepiece; EMD Coatings; 2-inch O.D.

    This 2” Explore Scientific 120° eyepiece is O-ring sealed and 100% waterproof. Internally sealing the eyepiece and purging it with inert, dry argon gas prevents ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: EP12009-01
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $1,679.99

    Special Price: $999.99

  15. Explore Scientific - AR152 f/6.5 Air-Spaced Doublet Achromat Refractor

    Explore Scientific - AR152 f/6.5 Air-Spaced Doublet Achromat Refractor

    The AR152 (six-inch), with its larger aperture optics gathers 44% more light over the AR127 (five-inch) model, providing much brighter images and higher resolution

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: DAR152065-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $1,120.00

    Special Price: $749.00

  16. Explore Scientific - AR152 f/6.5 Air-Spaced Doublet Achromat Refractor,

    Explore Scientific - AR152 f/6.5 Air-Spaced Doublet Achromat Refractor,

    The AR152 (six-inch), with its larger aperture optics gathers 44% more light over the AR127 (five-inch) model, providing much brighter images and higher resolution ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: DAR152065-00
    Take advantage of this incredible 2013 Spring Promotion Program

    Regular Price: $1,120.00

    Special Price: $749.00

  17. Opticstar - Optimum ONE - D80S Gold DS

    Opticstar - Optimum ONE - D80S Gold DS

    80mm f/6.5 ED Fluorite Doublet optics, dual speed Crayford focuser. ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: D80S
    $799.00

  18. TeleGizmos - Standard Solar Cover for 14" SCT's on Alt-Azimuth Fork Mounts

    TeleGizmos - Standard Solar Cover for 14" SCT's on Alt-Azimuth Fork Mounts

    The new TeleGizmos Solar Telescope Cover is made from ... Learn More
    Model#: TG14
    $57.00

  19. TeleGizmos - Standard Solar Cover for 14" SCT's & Maks on a German Equatorial Mount

    TeleGizmos - Standard Solar Cover for 14" SCT's & Maks on a German Equatorial Mount

    The new TeleGizmos Solar Telescope Cover is made from multi-layer ... Learn More
    Model#: TGG2
    $62.00

  20. TeleGizmos - Standard Solar Cover for Meade 16" Lightbridge Dobsonian

    TeleGizmos - Standard Solar Cover for Meade 16" Lightbridge Dobsonian

    The new TeleGizmos Solar Telescope Cover is made from multi-layer ... Learn More
    Model#: TGLB-16H
    $99.00

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The Astronomik UHC is THE filter for visual observing.

You will enjoy using your Astronomik UHC filter because you will see more stars and more details in deep-sky-objects compared to using filters from all other manufacturers.

The Astronomik UHC (Ultra High Contrast) filter allows the transmission of nearly 100% of the radiation from both O-III and the H beta lines. Though the second window for the H-alpha-line is not intended for visual observing, it is important, if the filter is used with an electronic device. All annoying, scattered light from other wavelength sources, including local artificial light pollution, is reliably filtered out. With this strong blocking of the sky background an unexpected wealth of detail becomes visible for gas nebulae and planetary nebulae.

Main use

Astronomik UHC filters’ astounding high light transmission brings better views of deep-sky-objects even to small telescopes! The high transmission of our optical glass filters means that enough light is available to allow successful visual observations with telescopes beginning at 2" (50mm) aperture. Our Astronomik filters are optimized for use with telescope focal length f / ratios of f/4 to f/15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play. Another major advantage of our Astronomik UHC filter is the high optical quality of the filter glass. When using Astronomik UHC filters you will quickly notice the same needle-sharp stars which you are familiar with from your astronomical instrument without any filter!

Suitability

  • Visual observation (dark skies): Very good, for telescopes of all apertures and high exit pupil
  • Visual observation (urban skies): Very good, for telescops from 100 mm aperture
  • Film photography: Reasonable, but very long exposure time
  • CCD photography: Good, when used with an additional IR-block-filter
  • DSLR photography (original): Good, colour balance shifted but contrast enhanced
  • DSLR photography (astro modified): Very good, colour balance is near perfect
  • DSLR photography (MC modified): Good, when used with an additional IR-block-filter
  • Webcam / Video (Planets): Unsuitable
  • Webcam / Video (Deep Sky): Good, if light pollution is a big problem

Technical Data

  • Transmission of nearly 100% of O-III and H-beta
  • Transmission of 96% of H alpha
  • Entire Blocking of annoying wavelengths
  • Ideal All-round Deep Sky filter even for small telescopes
  • Not sensitive to humidity or aging
  • Scratch-resistant!
  • Excellent carrier material. The optical Leitungs of your telescope is not reduced by the filter in any way.
  • Parfocal with other Astronomik filters
  • Glass thickness: 1mm
  • Completely resistant against high humidity, scratches and aging effects
  • Diffraction limited, the filter will not reduce the optical performance of your telescope!
  • Astronomik filters are delivered in a high-quality, long lasting, filter box

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