20″ Imaging Dall Kirkham Quartz
Telescope Name: 20″ Imaging Dall Kirkham
Telescope Price: $33,690 with quartz optics/heaters/temp sensors
Item #: 20iDKTCSHO
The AG Optical Systems .5 meter (20 inch) F6.7 Imaging Dall Kirkham (iDK) telescope is an observatory-class imaging instrument featuring an 70mm flat field imaging circle free from coma, astigmatism, and field curvature. The outstanding optical performance of the 20″ iDK is made possible through the convergence of careful design, state-of-the-art manufacturing, and precise assembly. Wide field images are captured with high-contrast details and sharp stars across the entire field of view.
The AG Optical Systems 20″ iDK F6.7 optical system provides exceptional thermal stability. Optical grade fused quartz optics ensure the figure and focus stability of the 20″ iDK as the temperature changes over the course of an imaging session. When combined with the rigid, thermally stable carbon fiber truss tube assembly of the 20″ iDK you can expect to spend less time focusing and more time collecting data.
AG Optical Systems iDK series carbon fiber truss optical tube assemblies make extensive use of carbon fiber composite materials, CNC-machined components, and precision collimation adjustments to provide a rigid and thermally stable platform for the low expansion optics. Three cooling fans speed the cooling of the primary mirror while primary and secondary mirror heaters can be automatically controlled by the optional Thermal Control System (TCS).
The optional, robust, digital Optec Gemini rotating focuser or Optec TCF-S3i focuser is ASCOM-compatible is capable of precision focusing and rotation while carrying heavy CCD imaging trains.
Optical Tube Assembly
Heavy Lycra shroud to block stray light, mitigate dust intrusion
Optec Gemini 3.75″ Rotating Focuser
Low profile (2.5″), rotating digital focuser with 20 lbs payload capacity, temperature compensation feature
Thermal Control System
Computer-based automated control of primary mirror cooling, primary and secondary mirror anti-dew control
Piggyback Dovetail Plate
CNC-machine 6061 aluminum Losmandy “D” profile piggyback dovetail plate
Optec TCF-S3i 3″ Digital Focuser
Robust, digital 3″ focuser with temperature compensation
- Carbon fiber optical truss tube assembly
- Losmandy “D” mount dovetail
- Primary and secondary dust covers
- Primary mirror cooling fans with power cable
- Primary and secondary mirror heaters and temperature sensors
- Low expansion substrate optics with enhanced aluminum coatings
- All stainless steel fasteners and springs
- Backplate carrying handles
20″ Imaging Dall Kirkham Spot Diagram
- .425 through .7 micron wavelength (LRGB)
- 10 micron pixel
- 70mm image circle (on-axis to 35mm off-axis)