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IRDK700 Dall-Kirkham f/6.5

Price: on request
(Price incl. German VAT excl. shipping)
Price: € 0.00
(Price excl. German VAT excl. shipping)

PlaneWave IRDK700 Dall-Kirkham f/6.5

The IRDK700, a 0.7 meter, is a fully automated observatory class telescope and direct drive alt-azimuth mounting system designed and engineered by PlaneWave.

This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared or ultra violet wavelengths. It is diffraction limited across a 20mm image circle at the focal plane. There are no refractive lens, only reflective components to the design. For IR application, reflectives coatings are a protected gold which give better than 98% reflectivity from .65 micron (650nm) to 5 micron (5000nm). This design is ideal for infrared astronomy or LIDAR applications. UV optimized coatings can also be used at an additional cost.

The DK is available in the three different apertures 24 ", 20", 28" and 12,5".

The telescope is also available in fused silica optics and Ritchey-Chrétien (RC) optics


  • Pinpoint stars out to a 70mm image circle
  • Direct-drive motors on each axis for smooth, fast, and virtually silent movement of the telescope. Direct Drive motors mean that there are no gears to cause backlash and periodic error
  • High resolution encoders on each axis for precise positioning
  • Incorporates PointXP mount modeling software by Dave Rowe All ASCOM compatible.
  • Dual Nasmyth focus, allowing simultaneous mounting of two instruments or easy switching between visual and imaging use
  • integrated rotator for the tertiary mirror, with magnetic locks to position the mirror precisely for either Nasmyth focus position. The rotator can move from one port to the other in under 10 seconds.
  • Field de-rotator / rotational field framing

Benefits of Nasmyth Focus: The Nasmyth Focus is along the altitude axis so there are virtually no balancing issue as you change out equipment. Eyepieces remain at a constant wheelchair-accessible height, greatly simplifying access to the telescope for public observatories. The rotating tertiary mirror allows you to switch from one Nasmyth port to the other in just seconds, allowing observers to easily transition between imaging and visual use

Fused Silica
Focusing unit
Scope of Delivery


Optical Design
Aperture (mm)
27.56" (700 mm)
Focal Length
4.540 mm (175.74 inch)
Focal Ratio
Image Field
70 mm
Back Focus Distance
12.2" (309 mm) from Mounting Surface
Central Obstruction
47% of the Primary Mirror Diameter
Fused Silica
Optical Tube Weight
1200 lbs (544 kg)
No mount (OTA only)
Manufacturer SKU
EAN Code


We reserve the right for errors and technical changes. For the latest information visit directly the manufacturer's website