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Askar 107PHQ F/7 Quadruplet Flat Field Astrograph

Brand: Sharpstar / Askar


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  • 107mm Aperture with Excellent Light-gathering Ability.
  • f/7 Focal Ratio for High Magnification.
  • Quadruplet air-spaced APO (including two ED glass)
  • Contractable Dew Shield
  • Includes a carrying case!

Product Details

  • The Askar 107mm F/7 Quadruplet Flat Field Astrograph

    As the first long-focal-ratio Flatfield astrograph from Askar, the 107PHQ is born with a special mission: to be a useful astrograph which is functionally practical, as well as physically attractive. Whether you are just getting started in astrophotography, or if you are an enthusiast who is familiar with this sort of equipment and device, out mission still stands.
    It's especially beginner-friendly since you don't need to purchase and attach an additional field flattener or worry about back focus. With this quadruplet telescope, simply attach your camera and imaging train, reach focus, and you're good to go.

    This astrograph is a versatile, all-rounder, long-focal-ratio Flatfield astrograph. It can be applied to any conceivable situation. That is the main reason why Askar produced the 107PHQ : to negate as much trouble as possible for its users.

    The Askar 107PHQ can capture tiny star objects due to its 740mm focal length and astonishing field flattening capacity. When using the Askar 107PHQ in combination with a high-resolution camera, you can bring out loads of detailed information from your target. It also works for visual observation. It fits both 1.25" and 2" zenith mirrors, as well as various eyepieces and can achieve perfect focus. It can even be used to observe planets using a super-high magnification eyepiece.


    Contains four lenses including two pieces of ED glass, which can better reduce chromatic aberration. It can achieve excellent color correction even with the magnification mounting to 300× in visual observation.

    The standard package includes an Askar 107PHQ OTA, a set of four-piece M86-M48 adapters, a pair of tube rings, a 300mm Askar Vixen-style dovetail plate and a high-quality aluminum suitcase.


    The sleek 107PHQ is assembled with high-quality CNC-machined components and wrapped with smooth coating and offset by the bright green decorative rings or knobs. The 3.4" rigid focuser is capable of handling a payload of 8kg. It’s designed with a long travel distance of 95mm, making it especially suitable astrophotography, as well as working for visual observation.

    The built-in Flatfield lens is a great contribution to Askar 107PHQ’s imaging ability. It supports 44mm full-frame imaging. The stars around the corner of the images rarely show distortion or deformation. At the center of its field of view, the RMS radius is only 3um. Even the most meticulous user will be satisfied when it comes to the shape of the stars. The Askar 170PHQ can effectively handle field curvature and vignetting issues. 


  • specifications

    Aperture107 mm (4.25")
    Focal Length749mm
    Optical DesignPetzval
    Optical DesignQuadruplet
    Tube Length754mm(when the dew shield is stretched)
  • included items

    • Askar 107PHQ OTA
    • Pair of tube rings
    • Askar 300mm Vixen-style dovetail plate
    • Set of four-piece M86-M48 adapters
    • High-quality aluminum case


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