PlaneWave CDK Astrographs
By pairing the classic Dall Kirkham design of an elliptical primary mirror combined with a spherical secondary mirror, with a correcting lens group PlaneWave creates an optimal imaging instrument. With an impressive image circle of 70mm that is completely flat and free from any coma or astigmatism, you'll be able to capture extremely wide field images. Focus is extremely stable and images are tack sharp.
Taking advantage of the natural durable, lightweight, temperature stable properties of carbon fiber, Planewave's CDK telescopes are not just portable but also resist focus shift which is extremely important during very long exposures. An open truss design helps to keep weight low - resulting in a 48 pound, 14" optical tube. Three cooling fans, located behind the primary mirror further help with keeping your mirror stable by ejecting air from the back of the telescope. Thermal equilibrium is quickly reached.
Add the optional EFA kit to control your fans via computer and don't forget the optional Delta T controller. Your PlaneWave Corrected Dall Kirkham telescope is already internally wired with polymide film heater pads and a temperature sensor to prevent dew.
Additional Features of the CDK 14 Corrected Dall Kirkham Telescope...
- Includes primary mirror cover for storage protection.
- Ronchi spacers to sit in place of a focuser to be used for setting the primary to secondary spacing. With a 1.25" inner diameter it can be used with 1.25" oculars for collimation.
- Central Obstruction: 23.5% by surface area; 48.5% by diameter
- Back Focus from Mounting Surface: 11.09 inches (282mm)
- Optical Performance: 3.1 micron RMS at 13mm off-axis; 6.0 micron RMS at 35mm off-axis.
- Diameter: 14.1 inches (358mm)
- Aperture: 14 inches (355.6mm)
- Focal Ratio: f/3.26
- Mounting: laser collimated & permanently fixed
- Material: precision annealed borosilicate
- Shape: prolate ellipsoid
- Coating: enhanced aluminum - 96%
- Diameter: 6.5 inches (165mm)
- Material: precision annealed borosilicate
- Shape: spherical
- coating: enhanced aluminum - 96%
- Diameter: 3.7 inches (95mm)
- Number of Lenses: 2
- Coating: broadband AR coatings (less than .5% reflected from 400 - 700nm)
- Additional Information
SKU PI-CDK14 Manufacturer PlaneWave Telescope Series Planewave CDK Optical Design Corrected Dall-Kirkham Mount Type None - Optical Tube Only Warranty 2 Year Warranty Telescope Aperture 14" Telescope Focal Length 2563mm Telescope Focal Ratio f/7.2 Optical Coatings Fully Multi-Coated Tube Color or Finish Carbon Fiber Optical Tube Outer Diameter Info Not Provided By Manufacturer Length of Optical Tube 35 in. Optical Tube Weight 48 lbs. Limiting Stellar Magnitude Info Not Provided By Manufacturer Highest Useful Magnification Info Not Provided By Manufacturer OTA Mount Type Losmandy-Style Dovetail Finder Included None
- Included Items
- 14" CDK Carbon Fiber Optical Tube
- Ronchi Spacer (600341 & 600344)
- Primary Mirror Cover
- Thumb Drive (contains all documentation and software for collimation & spacing)
- 12VDC Power Supply for Fans (not included for European orders)
- English Wrench Set (European orders only)
- Questions & Answers
Product QuestionsHow much better is the Planewave 14 inch than the Telestron 14 inch with there being a $5,000 difference. The Observatory in Dallas does not sell anything larger. ThanksQuestion by: JonDavid on Apr 6, 2014 5:47:00 AMThe Planewave scopes are dedicated astrographs for advanced astrophotography and are made in the USA. The RMS spot sizes of the optics are significantly tighter off axis (3.1 microns 13mm off axis and 6.0 microns 35mm off-axis) compared to the Celestron (~12 microns and >50 microns at the same points off center) meaning much sharper stars in good seeing with fewer aberrations. Technically, the C14 Edge only has a ~52mm image circle while the Planewave is good over 70mm. The primary and secondary mirror are both fixed on the Planewave and the structure and adapters are much sturdier.
For research or serious astrophotography, the CDK14 is at another level.Answer by: Chris (Admin) on Apr 7, 2014 7:01:29 AMI live just north of a light polluted city. I have a 130 mm apo refractor in a observatory. I'd like a little more aperture. Would I be better with a TEC 180 FL or would the planewave 14" suffer more from light pollution. . I enjoy both visual and CCD..thanksQuestion by: chris on Jul 23, 2015 9:05:00 AMThis is a fun question, in that it teases out some of the differences between perception and reality.
In reality, light-pollution affects any/all telescopes equally. This is a result of it reducing the apparent contrast of the sky. However, contrast alone does not allow us to see or image clarity in faint objects. For that we need both contrast and sufficient brightness. The result is that (visually) larger telescopes allow the "sky fog" to be more visible than in smaller telescopes, but so long as the smaller telescopes are gathering enough light for the background-brightness to be visible both large and small systems will be similarly affected. When imaging, the additional variable of focal-ratio is introduced (at least for non-stellar, extended objects).
Were it my decision, I would hold onto the 5" refractor and go with the 14" CDK. This combo would make it possible to photographically go after larger subjects with the shorter-system, and smaller, higher-resolution targets with the CDK.
If it will be only one, I would encourage you to give us a call to discuss... that becomes a harder decision we really want to help you explore.Answer by: Eric Blackhurst (Admin) on Jul 28, 2015 3:51:00 PM
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