We are here to help
Monday to Saturday - 10:00am-4:00pm
PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly
PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly
PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly
PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly
PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly
PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly

PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly

Please Call to Confirm the Price
(Inc. 20% VAT)
Special order item, Please contact us for an ETA
Please contact us for a quotation and lead time
Product Code
Email us a question about this ProductPlanewave

PlaneWave are proud to announce a new telescope to compliment their popular CDK range: the revolutionary Delta Rho 350 f/3 astrograph telescope. The Delta Rho 350 is designed for unsurpassed wide field imaging and ease of use in the field. Since the primary mirror is fixed in place collimation is quickly achieved by adjusted the tip and tilt of the secondary mirror. With the Delta Rho 350 your astrophotography experience will be second to none!

The main features include:

  • Corrected Cassegrain focus optical design
  • Aperture – 350 mm
  • Focal length – 1050 mm
  • Focal Ratio – f/3
  • 60mm Image Circle > 3 degrees
  • Fixed Primary Mirror and Secondary Mirror
  • Backfocus – 5.651” (143.535 mm) from mounting surface. This distance includes refraction from filters.
  • Built in primary and secondary dew heaters with temperature sensors

*L-350 mount seen in one of the product photos is sold separately

Capturing the most stunning astrophotographs possible is something PlaneWave's design team is passionate about. From design to manufacture, their goal with the DeltaRho 350 was centred around creating a game changing wide field telescope. The DeltaRho 350 is a Cassegrain optical design which means the imaging train is secured at the back of the telescope and does not block the light path compared to prime focus designs, which severely limit users ability to operate with filterwheels, or large cameras. The DeltaRho 350 is an incredible breakthrough in telescope technology and ease of use. Operating at f/3 and 1050 mm focal length, the DeltaRho is a wide field telescope that is sure to revolutionize your astrophotography!

Additionally, the DeltaRho 350 provides a perfectly flat field so your astrophotographs will have stunning clarity from corner to corner of the image without field curvature degrading the photos. Offering the simplicity of single-mirror collimation, the stray light control of advanced baffles, structural performance created through finite element analysis (FEA), and decades of telescope design experience, the DeltaRho 350 is an exceptional diffraction-limited telescope. DeltaRho 350 users can experience pinpoint stars edge-to-edge and a 170 x 170 arcminute field of view when using large 16803/4040 size camera sensors. This field of view is nearly 3 times as large as our CDK14! When equipment fades into the background and simply performs, the astrophotography experience becomes even more fun and rewarding!

Please note: a mandatory shipping crate is required for this product at time of purchase.


Specifications: PlaneWave DeltaRho 350 Astrograph Optical Tube Assembly

Optical System
  • Optical Design Corrected Dall-Kirkham (CDK)
  • Aperture 350 mm
  • Focal Length 1050 mm (41.34 inch)
  • Focal ratio f/3
  • Central Obstruction 56 % by diameter
  • Back Focus from Mounting Surface 5.651 inch (143.535 mm). This distance includes refraction from filters.
  • Weight 46 lbs (21 kg)
  • OTA Length 23 inch (584 mm)
  • Optical Performance 4.9 micron RMS on-axis, 6.2 micron RMS at 23 mm off-axis, and 7.6 micron RMS at 30 mm off-axis
  • Telescope Cage Carbon fiber truss poles with carbon fiber shroud
  • Optimal Field of View 60mm image circle
Secondary Mirror
  • Diameter 190 mm (7.48 inch)
  • Material Fused silica (quartz)
  • Shape Spherical
  • Coating Enhanced aluminum – 96%
Primary Mirror
  • Optical Diameter 13.78 inches (350mm)
  • Outer Diameter 14.5 inches (468.3mm)
  • Shape Prolate ellipsoid
  • Material Fused silica (quartz)
  • Coating Enhanced aluminum – 96%
Lens Group
  • Diameter 110 mm (4.33 inch)
  • Number of lenses Three
  • Coating broadband AR Coatings (less than .5% reflected from 400 to 700nm)
Standard Features
  • Corrected Cassegrain The corrected design yields a flat field free from off-axis astigmatism, coma, and field curvature.
  • Carbon Fiber Truss Design Minimizes thermal expansion which causes focus shift with changes in temperature.
  • Dovetail Expansion Joint Allows for the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminum dovetail expand and contract without stressing the carbon fiber 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 DR350 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
Reviews (0)

Be the first to Write a Review for this item!


At The Widescreen Centre, we prioritize prompt order processing and dispatch. We strive to dispatch all orders on the same day or the next working day, depending on the time of your order. We hold extensive stocks to ensure that your items are ready for immediate despatch. Please note that the cut-off time for same-day dispatch is usually 1:30 p.m.

For delivery within Mainland UK, we use reputable couriers to provide efficient service. You can expect your package to arrive in 1-2 working days. Please note that a signature may be required upon delivery to ensure a secure receipt.

In the case of special order items, the delivery time may be longer. If you have any concerns or questions about the delivery of your item, please don't hesitate to Contact Us. We are here to assist you.

Should there be any delay in dispatching your order, we will notify you to keep you informed.

Please be aware that The Widescreen Centre cannot be held responsible for any postal or third-party delays that may occur. We are committed to providing a reliable and efficient delivery service for our valued customers.

For more information please click here

FAQ - Have a question about this product? Fill in the form below and we will get back to you as soon as we can!