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PlaneWave Delta Rho 500
After successfully introducing the DeltaRho 350, the DeltaRho 500 is now available for transcending the challenges of-ultra wide field imaging. With a primary mirror that is fixed in place, collimation is quickly achieved with a simple adjustment to the tip and tilt of the secondary mirror. With more than twice the light-gathering power of the DeltaRho 350, maximizing the performance of your astrograph has never been easier due to PlaneWave’s pursuit of the perfect telescope!
Our team at PlaneWave is passionate about designing exceptional telescopes so that users around the world are able to capture the most awe-inspiring astro images possible. From design to manufacture, our goal with the DeltaRho 500 was centered around creating a revolutionary wide-field telescope. The DeltaRho 500 is a Cassegrain Optical Design with the imaging train at the back of the telescope to prevent obstruction of the instrument. This offers a real advantage against prime focus designs, which can severely limit users’ ability to operate with filter wheels or large cameras. Witness the incredible breakthrough in telescope technology as the DeltaRho 500 operates at f/3 and 1537 mm focal length, which is sure to revolutionize your astrophotography.
Last, but not least, the DeltaRho 500 provides a flat field, which ensures stunning clarity from corner-to-corner images without field curvature degradation. The DeltaRho 500 offers the simplicity of single-mirror collimation, stray light control of advanced 3D printed baffles, and structural performance created through finite element analysis (FEA). DeltaRho 500 users can experience pinpoint stars edge-to-edge and a 2-degree field of view when using large 16803/4040 (52mm) size camera sensors. This field of view is over twice as large as our CDK 20! This kind of equipment allows users to experience a whole new level of wide-field imaging that can bring them closer than ever to deep space. The DeltaRho 500 allows nothing to stand in between the user and amazing astro images.
Minimizes thermal expansion which causes focus shift as temperature changes during an imaging session. Carbon fiber also reaches ambient temperatures quickly and is extremely lightweight and rigid to help ensure that excellent imaging data is produced.
Along with the included collimation mask, PlaneWave Collimation software allows for quick and easy collimation necessary to maximize the performance of a fast f-ratio optical system.
PlaneWave’s digital 3D printing technology adds successive layers of material to our baffle systems for lightweight, precision-positioned internal stray light control to minimize vignetting and maximize image contrast.
Three fans are strategically placed on the backplate of the optical tube to ventilate through the telescope and by the primary mirror. Four additional fans on the side of the optical tube provide airflow across the primary, bringing thermal equilibrium efficiently to prevent distorted images due to temperature variations.
The fans are controlled via the PWI 4 software with the PlaneWave Series 5 Controller sold separately.
For added dew prevention, the DR500 is internally wired with polyimide film heater pads and a temperature sensor, which is ready to be controlled with the Series 5 Controller via PWI 4 software.
| Optical Design | Corrected Cassegrain |
| Aperture | 508 mm (20 inch) |
| Focal Length | 1537 mm (60.5 inch) |
| Focal ratio | f/3 |
| Central Obstruction | 59 % by diameter |
| Back Focus from Mounting Surface (No focuser/rotator installed) | 9.166 in (232.8 mm) from mounting surface; 7.271 inch (184.7 mm) from lens cell |
| Weight | 165 lbs (75 kg) |
| OTA Length | 35.1 inch (892 mm) |
| Optical Design Performance (Spot Diameter) | 3.86 micron RMS on-axis, 4.04 micron RMS at 22 mm off-axis, and 6.04 micron RMS at 35 mm off-axis (Spot Diameters) |
| Telescope Cage | Carbon fiber truss poles with carbon fiber shroud |
| Optimal Field of View | 70mm image circle |
| Optical Diameter | 20 inch (508 mm) |
| Outer Diameter | 20.8 inch (528 mm) |
| Shape | Prolate ellipsoid |
| Material | Fused silica (quartz) |
| Coating | Enhanced aluminum – 96% |
| Diameter | 286 mm (11.26 inch) |
| Material | Fused silica (quartz) |
| Shape | Spherical |
| Coating | Enhanced aluminum – 96% |
| Diameter | 160 mm (6.3 inch) Largest Lens |
| Number of lenses | Three |
| Coating | Broadband AR Coatings (on avg. less than .5% reflected from 400 to 700 nm) |
| Heating elements for dew prevention | The heating pads on the primary and secondary mirror require the Series 5 Controller (sold separately). |
| OTA Cover | Which protects the primary mirror and the inside of the optical tube. |
| Flashdrive | Contains software and instructions for collimation and spacing the primary to the secondary mirror. |
| Wrench Set (5812A35) | Standard hex wrenches (European orders only) |
For the DeltaRho 500 and Series-5XL Focuser:
To achieve proper mechanical clearance, a 0.5″ spacer (#6003165) is required.
If the user plans on using our Focuser and Rotator, the 0.5″ spacer is placed in between the Focuser and Rotator, then the Tip-Tilt Adapter.
If the user plans on using only the focuser, the 0.5″ spacer, assembles as follows: OTA, Focuser, Spacer, then Tip-Tilt Adapter.
The Tip Tilt Adapter is compatible with the Series- 5XL Focuser, as both the focuser and the tip-tilt accessory use the 7.125″ flange interface.
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Imaging Accessories
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