Skip to content
Price match 30-day returns* Talk to an astronomer before you buy
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph
Sky-Watcher HAC125DX Minigraph f/2 Astrograph

Sky-Watcher HAC125DX Minigraph f/2 Astrograph

by Sky-Watcher
SKU SW-S11250
CA$1,380.00 - CA$1,380.00
CA$1,380.00
CA$1,380.00 - CA$1,380.00
CA$1,380.00
Price Match Policy!
  • 125mm (4.9 inches) Honders Advanced Catadioptric Optics
  • Extremely Fast f/2 Focal Ratio
  • 250mm Focal Length for Wide-Field Imaging
  • 16mm Image Circle, Ideal for IMX533 and IMX585 Cameras
  • Lightweight 8.4-pound Optical Tube
  • Primary Mirror Helical Focuser
1 in stock
FREE Shipping in Canada
Framing Simulator
Framing SimulatorInstant FOV Preview

Preview your camera's FOV

See exactly how your targets fit with the Sky-Watcher HAC125DX Minigraph f/2 Astrograph, on real sky survey data.

Launch Imaging Assistant
Vignetting Calculator

Will your imaging train vignette?

Check which filter and adapter sizes clear the sensor with the Sky-Watcher HAC125DX Minigraph f/2 Astrograph, and how much light the corners lose.

Check vignetting
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Sky-Watcher HAC125DX Minigraph f/2 Astrograph

    The Sky-Watcher HAC125DX Minigraph is a 125mm Honders Advanced Catadioptric astrograph with a 250mm focal length at f/2. The design uses hybrid refractive and reflective surfaces for a fast, light mini astrograph with a 16mm image circle. The tube is 15.7 inches long and weighs 8.4 pounds.

    A 125mm f/2 Minigraph

    The HAC125DX is a high-speed astrograph designed for fast, wide-field imaging in a compact package, and a powerful imaging platform for both beginners and advanced imagers.

    It is a grab-and-go astrograph: attach it to your favorite portable mount and start imaging.

    Optical Design: The Honders Advanced Catadioptric System at f/2

    The primary is a Mangin mirror and the corrector has HTMC coatings. The secondary obstruction is 53mm in diameter.

    Imaging at f/2

    The f/2 focal ratio captures images five times faster than a standard f/4.9 optic, meaning more data in less time, and no need to autoguide.

    Image Circle and Camera Adapters

    The 16mm image circle is ideal for cameras with IMX533 and IMX585 sensors.

    A 1.25-inch adapter, male and female M42x0.75 adapters and a dew shield are included, and the tube has dual finderscope brackets and a 1.25-inch barrel. Sky-Watcher does not give a back focus figure.

    Focusing and Tube

    The tube is 15.7 inches long and 6.3 inches in diameter. A single-speed rear helical focuser moves the primary mirror. This lets a wider range of cameras be used and makes focusing easier when the telescope is in use.

    The tube assembly includes:

    • Clamshell rings with a V-style dovetail.
    • Dual finderscope brackets.
    • Dew shield (included).

    Mounting and Collimation

    The tube weighs 8.4 pounds (3.82 kg) and mounts with clamshell rings on a V-style dovetail, so use a mount with a Vixen-style saddle. Attach it to your favorite portable mount.

    The primary mirror sits in a collimatable cell with rear support.

  • What mount does the HAC125DX need?

    A portable mount with a Vixen-style saddle: the tube weighs 8.4 pounds and has clamshell rings with a V-style dovetail. Attach it to your favorite portable mount.

    Which cameras suit the 16mm image circle?

    The 16mm image circle is ideal for IMX533 and IMX585 cameras.

    How much faster is f/2?

    The HAC125DX captures images five times faster than a standard f/4.9 optic.

    Do I need to autoguide with the HAC125DX Astrograph?

    The f/2 speed means more data in less time and no need to autoguide.

    What is its back focus?

    Sky-Watcher does not give a back focus figure. It says the rear helical focuser, which moves the primary mirror, lets a wider range of cameras be used.

    What does "Honders Advanced Catadioptric" mean for the HAC125DX?

    Sky-Watcher's Honders Advanced Catadioptric design uses hybrid refractive and reflective surfaces: a Mangin primary mirror and an HTMC-coated corrector, in a 15.7-inch tube.

    How do I focus the HAC125DX astrograph?

    A rear helical focuser moves the primary mirror, which allows a wider range of cameras and makes focusing easier. Male and female M42x0.75 adapters are included.

    Does the primary mirror need to be collimated on the HAC125DX?

    The primary mirror sits in a collimatable cell with rear support.

    What comes in the box?

    The optical tube with clamshell rings and V-style dovetail, a 1.25-inch adapter, male and female M42x0.75 adapters and a dew shield.

    How large is the secondary obstruction on the HAC125DX?

    53mm in diameter.

  • UPC 810098970648
    Optical Design Honders Advanced Catadioptric
    Primary Aperture 125mm (4.9 inches)
    Focal Length 250mm
    Focal Ratio f/2
    Image Circle 16mm
    Mirror Type Mangin
    Glass Type Borosilicate
    Mirror Coating Radiant Aluminum Quartz (RAQ)™ Coatings
    Reflectivity 94%
    Corrector Coating HTMC™
    Collimation Primary Mirror
    Secondary Obstruction 53mm (42.5% by area)
    Focuser Primary Mirror Helical, Single Speed
    Optical Tube Length 15.7 inches
    Optical Tube Diameter 6.3 inches
    Optical Tube Weight 8.4 pounds
    Mounting Hardware Clamshell rings with V-style dovetail
    Included Adapters 1.25", male and female M42x0.75 camera adapters
    Mount No (optical tube only)

    • HAC 125DX Optical Tube Assembly

      × 1

    • Clamshell Rings with V-style Dovetail

      × 1

    • 1.25" Camera Adapter

      × 1

    • M42x0.75 Camera Adapters (Male and Female)

      × 2

    • Dew Shield

      × 1

  • Sky-Watcher 2-Year Warranty