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AG Optical - 14.5" Dall Kirkham Astrograph Telescope


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Availability: This item is special order. Delivery times will vary. Place your order today and your card will not be charged until the item ships.


This item is special order. Delivery times will vary. Place your order today and your card will not be charged until the item ships.

Manufactured by: AG Optical Systems


Imaging Dall Kirkham (iDK) astrographs are high resolution instruments with outstanding on and off axis performance across a 60mm field of view. By combining large aperture, medium focal ratio, corrected optics in a lightweight, stiff, and thermally stable carbon fiber tube AGO has created an instrument capable of capturing stunning images of our universe at the most aggressive pricing on the market.

An optional quartz upgrade is now available for all iDK telescopes.  Quartz' extremely low coefficient of thermal expansion allows the figure on the optics to remain stable while ambient temperatures vary.  This means you will spend more time imaging and less time waiting for the optics to stabilize.


  • Highly robust, precise Optec TCF-S3i focuser is standard, included in price.   Optec Gemini rotating focuser upgrade option.  
  • High reflectivity 96% coatings produced in Ostahowski Optics' state-of-the-art coating chamber
  • Outstanding field illumination across big chip cameras. 
  • Carbon fiber truss tube engineered to provide rigidity and thermal stability.
  • CNC machined components with stainless steel fasteners
  • Best  in class customer support


AG Optical Systems Telescope Thermal Control System (TCS)

What is the AG Optical Systems Thermal Control System?

The AG Optical Systems Thermal Control System consists of a PC application, primary mirror cooling fans, primary mirror heater, secondary mirror heater, and three temperature sensors.  Based on user defined settings, the system will automatically trigger cooling fans and/or heaters to speed the cooling of the primary mirror while preventing the formation of dew on the primary mirror and secondary mirror. 

Thermal Control System Components

  • TCS Controller - electronic contol board with long-life relays to energize fans and heater
  • Primary and secondary mirror heaters - custom-made Kapton thin film heaters strategically placed to provide heat to the primary and secondary mirrors to prevent or slow dew formation
  • Cooling fans - three cooling fans located behind primary mirror to facilitate thermal equalization of the primary mirror with ambient air
  • Temperature Sensors - ambient, primary mirror and secondary mirror temperature sensors
  • TCS PC control application - Windows-based application that allows users to control the TCS system


Thermal Control System PC Application Features  
  • Automatic control of cooling fans and mirror heaters
  • User defined thresholds determining when fans or heaters are active
  • USB connectivity to computer
  • 12 VDC power
  • Fahrenheit or Celsius degree display
  • Time stamp logging of temperature readings and fan and heater states
  • Manual mode allowing user control of cooling fans and heaters
  • Duty cycle settings for primary and secondary heaters to manage rate at which heat is applied to mirrors
  • Compact, rugged, CNC-machined housing.



Additional Information

Name AG Optical - 14.5" Dall Kirkham Astrograph Telescope
Manufacturer AG Optical Systems
Model 145IDK
Manufacturer Part No 145IDK
Telescope Aperture 14.1" - 16"
Aperture 14.5
Backfocus Distance 6.5" with Optec TCF
Baffling primary and secondary baffles, baffled for 2" diagonal size chip
Dovetail Compatibility Heavy-duty, Losmandy "D" compatible dovetail plate included
Fans 3 x 60mm fans
Focal Length 97.2"
Focal Ratio 6.7
Focuser Optec TCF-S3i 3" temperature compensating digital focuser
Optical Tube CF Truss
Optical Tube Length 36"
Optical Tube Weight approx. 54 lbs
Secondary Mirror 7.5"