Phone: (256) 723-8381
Email: info@agoptical.com

Imaging Dall Kirkham Astrograph

"I guess you can tell I am quite happy with the [iDK] scope and highly recommend them.  I have to thank Dave for the effort of design and build of my new iDK.  I don't ever intend to sell it."  Gerald Miller - OK, USA

AG Optical Systems' Imaging Dall Kirkham (iDK) astrographs are high resolution, premium quality instruments with outstanding on and off axis performance across a huge 60mm field of view. By combining large aperture, medium focal ratio, corrected optics in a lightweight, stiff, and thermally stable carbon fiber tube AG Optical Systems has created a 100% made-in-the USA instrument capable of capturing stunning images of our universe. 

We invite you to compare our quality, customer service, and performance to that of our competition.  You will quickly see that where others cut corners we incorporate quality, where others wait days or weeks to respond to your inquiries we respond within hours.  Contact AG Optical Systems to experience the quality, innovation, and performance that forms the foundation of everything we do. 

Can your telescope produce this type of image?   If not call AG Optical Systems!     Telescope specs are listed below.

M81 by Dan Wilson, AG Optical Systems 17" iDK 

M81 by Dan Wilson, AG Optical Systems 17" Imaging Dall Kirkham 

Now available with Optec's new Gemini rotating focuser with temperature compensation! 

Quartz optics are included as standard with all AG Optical Systems Imaging Dall Kirkham telescopes.  We know you don't compromise when it comes to your images so why should we?

 

Imaging Dall Kirkham Astrograph Features
  • High-performance, ultra-low expansion QUARTZ optics figured and quality tested as a system by Ostahowski Optics.
  • Fast F6.7 system designed and baffled to cover 50mm and larger size chips. Click here to see CCD Inspector analysis of a 17" iDK over a 43' x 29' field of view.
  • Over 6.25" of back focus to support almost any combination of imaging components
  • Excellent coma free, astigmatism free, flat field performance over 60 mm image circle. Ckick here and here to see the performance of a 12.5" iDK using a camera with a 2" diagonal chip (36mm x 36mm array, 52mm diagonal).
  • RMS spot diameter* less than 9 microns across 60 mm image circle from .380 to 1 microns (we state RMS spot size in diameter rather than radius as do other manufacturers)

             * Spot diagrams:   12.5" iDK14.5" iDK17" iDK, 20" iDK

  • Highly robust, precise Optec TCF-S3i focuser is standard.   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. Click here to see an unprocessed iDK image taken by a 16803 CCD camera that has not been flat fielded.
  • Carbon fiber truss tube engineered to provide rigidity and thermal stability.
  • CNC machined components with stainless steel fasteners
  • Best  in class customer support and pricing

 

System Specifications                                                                          

Model iDK12.5  iDK14.5  iDK17 iDK20
Aperture 12.5 14.5 17" 20"
Focal ratio 6.7 6.7 6.7 6.7
Focal length 83.5" 97.2" 114" 134"
Back focus (at mid travel of focuser) 6.5" with Optec TCF
6.5" with Optec TCF
6.25" with Optec TCF
6.25" with Optec TCF
OTA type CF Truss CF Truss CF Truss CF Truss
Fans (blowing air into OTA)  3 x 60mm fans    3 x 60mm fans 3 x 80 mm fans 4 x 80 mm fans
Secondary obstruction 6.7" 7.5" 8.2" 9"
Focuser (included) Standard: Optec TCF-S3i 3" temperature compensating digital focuser
Corrector Two element,
<.5% reflection broadband AR coated on every lens surface
Optics Quartz primary and secondary mirrors, 96% Enhanced
Aluminum, coated by Ostahowski Optics
Baffling primary and secondary baffles, baffled for 2" diagonal size chip
Dovetail Heavy-duty, Losmandy "D" compatible dovetail plate included
Tube length 30" 36" 42" 47"
Dimensions Here   Here  
OTA Weight approx. 44 lbs approx. 54 lbs approx. 102 lbs approx. 141 lbs
OTA weight with dovetail &  focuser approx. 52 lbs approx. 58 lbs approx. 110 lbs approx. 150 lbs
Price $12,995 $16,975 $23,995 $33,995
Optec Gemini rotating focuser upgrade $1695 $1695 $1695 $1695
AGO Thermal Control System $975 $975 $975 $975
Shroud $125 $135 $140 $165
Piggyback Dovetail Plate $225 $245 $265 $305
Crating $250 $275 $375 $475
Spacers & Adapters Contact AG Optical Systems
Delivery Contact AG Optical Systems
Shipping Contact AG Optical Systems

12.5" iDK Truss Astrograph

Solidworks CAD model of 12.5" Imaging Dall Kirkham astrograph

IC410 by Tim Khan, AG Optical Systems 12.5" iDK, 16803 2" diagonal CCD chip 

AG Optical Systems 12.5" Imaging Dall Kirkham secondary spider assembly

AG Optical Systems 12.5" Imaging Dall Kirkham Truss Structure

AG Optical Systems Thermal Control System

M81 by Dan Wilson, AG Optical Systems 17" iDK, SBIG STLX camera

NGC6960 by Mike Miller, AG Optical Systems 12.5" Imaging Dall Kirkham, Apogee camera