PlaneWave CDK24 f/6.5 Optical Tube Assembly | PixelSkiesAstro
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  • PlaneWave CDK24 f/6.5 Optical Tube Assembly | PixelSkiesAstro

PlaneWave CDK24 f/6.5 Optical Tube Assembly

€94,800.00
Tax included

PlaneWave CDK24 f/6.5 Optical Tube Assembly The CDK24 is a 610 mm Corrected Dall-Kirkham astrograph with a 3974 mm focal length and a flat, coma- and astigmatism-free 70 mm image circle, for observatory-class research and imaging.

Manufacturer model: PlaneWave CDK24 f/6.5 OTA (240104Q) · Specifications checked against manufacturer data on 2026-11-03

PlaneWave CDK24 f/6.5 Optical Tube Assembly

The CDK24 is a 610 mm Corrected Dall-Kirkham astrograph with a 3974 mm focal length and a flat, coma- and astigmatism-free 70 mm image circle, for observatory-class research and imaging.

Construction

Fused silica mirrors and a carbon fibre truss with aluminium light shroud minimise focus shift with temperature. Cooling fans and Delta-T-ready mirror heaters keep the optics stable and clear of dew.

Optical system

Optical design Corrected Dall-Kirkham
Aperture 610 mm (24")
Focal length 3974 mm
Focal ratio f/6.5
Central obstruction 47% of primary diameter
Image circle 70 mm
Optical performance 2.4 µm RMS on-axis; 4.0 µm at 26 mm; 4.8 µm at 35 mm off-axis
Primary mirror 610 mm optical / 622 mm outer, prolate ellipsoid, enhanced aluminium 96%
Secondary mirror 280 mm spherical, fused silica, enhanced aluminium 96%
Corrector lenses 135 mm, broadband AR (<0.5% reflection, 400–700 nm)

Mechanical

Back focus from mounting surface 364.46 mm (14.349")
OTA length 1422 mm (56")
Weight 108.9 kg (240 lb)
Upper / lower cage Carbon fibre truss / carbon fibre truss with aluminium light shroud

Standard manufacturer package

  • CDK24 focus spacer 240343-1 (5.539"; leaves 8.8" back focus behind the focuser)
  • Primary mirror cover
  • Hex wrench set (European orders)

Manufacturer documentation

PlaneWave CDK24 OTA · CDK24 overall dimensions

Compatibility notes

Standard CDK24, not IRDK24. Uses PlaneWave Wide Saddle on L-600.

1323224Q

Data sheet

Aperture (mm)
610
Bf mount (mm)
364.46
Design
Corrected Dall-Kirkham
Focal length (mm)
3974
Focal ratio
f/6.5
Image circle (mm)
70
Included
Focus spacer 240343-1, mirror cover, wrenches
Length (mm)
1422
Lenses
135 mm broadband AR
Obstruction
47% diameter
Performance
2.4 um on-axis; 4.0 um @26 mm; 4.8 um @35 mm
Primary
610/622 mm prolate ellipsoid, Al 96%
Secondary
280 mm spherical fused silica, Al 96%
Weight (kg)
108.9
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