About this product
PlaneWave's CDK14 is a 14-inch (0.36 m) aperture f/7.2 telescope that is very well suited for astro-imaging as well as for visual use.
The CDK14 telescope utilises the Corrected Dall-Kirkham (CDK) optical design, developed by Dave Rowe, that provides excellent imaging possibilities with large format CCD cameras, while remaining superb for visual use. The CDK design far exceeds the off-axis performance of most commercial telescope designs including the Ritchey-Chrétien design making the CDK an innovative solution for unsurpassed astro-imaging quality at an affordable price.
The end result, at the image plane of the CDK14, will give you pinpoint stars from the center to the corner of its 70mm field of view without any field curvature, off-axis coma, or astigmatism. The no-compromise optical design is unique in making the optical alignment forgiving and collimation very easy which guarantees the user the best possible performance from the telescope.
The CDK14 features a dual carbon-fibre truss design, with 3 cooling fans blowing air throughout the back of the telescope, The instrument weighs 22kg (48 lbs) and comes as standard with a back plate retaining ring ready to accept the focuser of your choice. The relatively low weight of the CDK14 means it can be used, with additional accessories, on medium sized mounts such as the 10Micron GM2000 (or above) or the Paramount MX+ (and above).
The CDK14 telescope is an open truss tube design for a rigid, but lightweight structure, and for quick thermal cooling. The truss tube utilises a carbon fibre frame which minimises thermal expansion that can cause focus shift with changes in temperature. The carbon fibre truss tube design also promotes quick thermal cooling.
To create the telescope's baffles, Planewave uses digital 3D printing technology. Their 3D printers add successive layers of material to construct a baffle system with precision. These internal stray light baffles minimise vignetting and maximise image contrast.
To mount the CDK14 onto a mount, PlaneWave supplies the CDK with a dovetail bar. The CDK features a dovetail expansion joint that allows for the difference in thermal expansion between carbon fibre and aluminium. This expansion joint allows the aluminium dovetail expand and contract without stressing the carbon fibre lower truss.
To help the primary mirror to cool, there are three cooling fans that blow air inside the back of the telescope. Furthermore, internal diverting fins circulate air flow behind the mirror for even cooling to help the telescope reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.
For dew prevention, the CDK14 is internally wired with polyimide film heater pads and temperature sensor, ready to be controlled with the optional Delta-T controller.
|Optical Design ||Corrected Dall-Kirkham (CDK) |
|Aperture ||14 inch (356mm) |
|Focal Length ||2563mm (101 inch) |
|Focal ratio ||F/7.2 |
|Central Obstruction ||23.5% by surface area; 48.5% by diameter |
|Back Focus from Mounting Surface ||11.09 inch (282 mm) |
|Weight ||48 lbs (22 kg) |
|OTA Length ||35 inch (889 mm) |
|Optical Performance ||3.1 micron RMS at 13mm off-axis; 6.0 micron RMS at 35mm off-axis |
|Upper Cage ||Carbon Fibre Truss |
|Lower Cage ||Carbon Fibre Truss and Light Shroud |
|Optimal Field of View ||70mm Image Circle |
|Diameter ||165 mm (6.5 inch) |
|Material ||Precision Annealed Borosilicate |
|Shape ||Spherical |
|Coating ||Enhanced Aluminium - 96% |
|Optical Diameter ||14 inches (355.6) |
|Outer Diameter ||14.5 inches (468.3mm) |
|Shape ||Prolate Ellipsoid |
|Material ||Precision Annealed Borosilicate or Fused Silica |
|Coating ||Enhanced Aluminium - 96% |
|Diameter ||95mm (3.7 inch) |
|Number of lenses ||Two |
|Coating ||broadband AR Coatings (less than .5% reflected from 400 to 700nm) |
|CDK Optics ||The Corrected Dall-Kirkham design yields a perfectly flat field free from off-axis astigmatism, coma and defocus. |
|Carbon Fiber Truss Design ||Minimises thermal expansion which causes focus shift with changes in temperature |
|Dovetail Expansion Joint ||Allows for the difference in thermal expansion between carbon fibre and aluminium. The expansion joint allows the aluminium dovetail expand and contract without stressing the carbon fibre lower truss |
|Cooling Fans ||Three cooling fans blow air inside the back of the telescope. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased. |
|Delta-T Ready ||For added dew prevention, the CDK14 is internally wired with polyimide film heater pads and temperature sensor, ready to be controlled with the optional Delta-T controller. |
|Crated Shipping Weight || 225 lbs |
|Crate Width || 31 inches |
|Crate Height || 26 inches |
|Crate Length || 53 inches |
What's in the box
Primary Mirror Cover
Planewave Thumb Drive
12v DC Power Supply
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