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Imaging Harmer Wynne Astrograph

Imaging Harmer Wynne (iHW) astrographs are exceptionally compact, high resolution, fast focal ratio instruments with excellent on and off axis performance. By combining large aperture, fast focal ratio, corrected optics in a lightweight, stiff, and thermally stable carbon fiber tube AG Optical Systems has created a compact instrument capable of conducting serious scientific work (such as sky surveys) or capturing wide field images of deep space objects.

All AG Optical Systems iHW astrographs are designed to provide razor sharp images across a large field of view in a compact optical tube assembly.  The integral three element corrector eliminates coma and astigmatism while providing small RMS spot sizes (4 to 9 micron diameter, or 2 to 4.5 micron radius) over a 60mm diameter FOV.   When matched with an Optec Gemini rotating focuser and rock solid carbon fiber truss tube, the AG Optical Systems iHW will meet your demanding performance expectations.

Included with each iHW astrograph:  optical tube assembly, hand-figured optics by master optician Mike Lockwood,  Optec Gemini rotating focuser, piggyback dovetail plate, mount dovetail plate, and shroud


Imaging Harmer Wynne Astrograph Features


  • Precision optics figured and quality tested as a system by master optician Mike Lockwood.
  • Blazing fast F3.85 system designed and baffled for big chip CCD cameras
  • 8" of back focus to support almost any combination of imaging components (dependent upon focuser selected)


  • Optec Gemini rotating focuser with PC cable and power supply
  • Compact, carbon fiber composite truss tube for mechanical and thermal stability
  • Primary mirror cooling fans
  • Option Thermal Control System for automated control of cooling fans, primary and secondary anti-dew heaters 
  • Heavy duty dovetail plate (Losmandy D compatible)

System Specifications                                                                          

Model iHW14 iHW16
Aperture 14" 16"
Focal ratio 3.85 3.9
Focal length 53.9" 62.4"
Back focus
8" from back plate to focal plane
7.5" from back plate to focal plane
OTA type Carbon Fiber Truss Carbon Fiber Truss
Fans (blowing air into OTA)    3 x 60mm fans 3 x 80 mm fans
Secondary obstruction 8" 8.4"
Focuser (included) Optec Gemini rotating focuser Optec Gemini rotating focuser
Corrector  multi element, broadband AR coated  multi element, broadband AR coated
Mirror Coatings Enhanced Aluminum Enhanced Aluminum
Baffling primary and secondary baffles, baffled for 16803 size chip primary and secondary baffles, baffled for 16803 size chip
Dovetail Massive, thermally compensated dovetail plate included Massive, thermally compensated dovetail plate included
Tube length approx. 25" approx. 32"
Tube weight with dovetail &  focuser approx. 62 lbs approx. 88 lbs
Price (ota, Gemini rotating focuser, shroud, dovetail) $24,775 $27,995
AGO Thermal Control System $975 $975
Crating $275 $375
Spacers & Adapters contact AG Optical Systems
Delivery Time contact AG Optical Systems
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