Officina Stellare 300mm f/8 RiDK Astrograph OTA w/ 72mm Manual Focuser - Full Carbon - Discontinued

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Officina Stellare 300mm f/8 RiDK Astrograph OTA w/ 72mm Manual Focuser - Full Carbon - Discontinued   Discontinued
Item # OF-RIDK300FC
  • The Officina Stellare RiDK 300 astrograph is a modified Dall-Kirkham created by Officina's talented optical designer, Massimo Riccardi.
  • The RiDK 300 includes a 72mm manual FineFocus focuser.
  • This 12" f/8 telescope delivers a fully corrected 63mm diffraction limited image across the entire field in the 380 - 2000 nm spectral range.
  • Back focus is 240mm, and the optical tube is made entirely of zero expansion carbon.
  • The RiDK 300mm OTA package comes with four Losmandy-style dovetails, three ventilation fans, manual control and heating of the mirrors, a black fabric shroud, and caps.



About the Officina Stellare RiDK Astrographs…

Officina Stellare is one of today's leaders in the production of high quality astronomy equipment for the discerning professional or advanced amateur. Their products can be found in observatories around the world, and their high speed tracking lens systems are a relied upon component in the industries of aerospace and defense.

The RiDK 300 (Riccardi Dall-Kirkham) represents the new reference point for all modified Dall-Kirkham instruments available on the market today. Massimo Riccardi, Chief Optical Designer at Officina Stellare, has the unique experience and creativity required to imagine and build a 300mm astrograph of superior performance and resulting image quality. The RiDK 300 is a system that delivers a 60mm fully corrected, flat field and an imaging performance that is diffraction limited across the entire field over a wide spectral range (380nm to 2000nm). These outstanding optics are mounted inside a state-of-the art Officina Stellare open truss tube made of zero expandsion carbon fiber; the same high quality optical tube assembly used in all Officina Stellare open truss-style telescopes the world over.

The Officina Stellare RiDK 300 is manufactured from start to finish in Italy. The optics are made in the Occhiobello Plant under the strict quality control of Massimo Riccardi, Officina's own optical designer. The mechanics of the telescope were designed by Giovanni Dal Lago, and are engineered, manufactured and assembled at the Thiene plant.

The OS RiDK 300 is the ultimate astro-imaging telescope for anyone who desires the best equipment when it comes to the imaging of deep sky wonders. It is a beautiful, compact and perfectly manufactured optical instrument, and the long back focus allows the mounting of rotators, cameras, filter wheels, and other imaging accessories.

The RiDK 300mm comes with four Losmandy style dovetails mounted on the truss for mounting versatility. Three ventilation fans are part of the design, which helps the telescope reach ambient temperature as quickly as possible.

Unlike a standard Officina Stellare truss tube design which is both aluminum and carbon fiber, this full carbon tube model.  Made entirely out of carbon fiber, the optical tube is exceptionally temperature stable which is optimal in research and imaging applications where stability is crucial.


Officina Stellare 300mm f/8 RiDK Highlights…


  • Aperture: 300mm (12")
  • Focal Ratio: f/8
  • Focal Length: 2400mm
  • Linear Obstruction: 48%
  • Full Correct and Illuminated Field: 60mm
  • Back Focus: 240mm
  • OTA: Zero Expansion Carbon Fiber truss for thermal stability and light weight.
  • Weight: 27 Kg (60 lb).
  • Dimensions: 490 x 490 x 910mm (19.29 x 19.29 x 35.83 inches)
  • Diffraction limited across field in 380 - 2000 nm spectral range, near UV to near IR


This RiDK Package Includes…


  • 12" Riccardi Dall-Kirkham Astrograph in Full Carbon Truss Design
  • Four Losmandy-Style Dovetails
  • Three Ventilation Fans
  • Mirror Heating
  • 72mm Manual Focuser
  • Manual Control on Both Mirrors
  • Manual Movement of Secondary Mirror
  • Black Fabric Shroud
  • Caps/Covers
Additional Information

Additional Information

Manufacturer Officina Stellare
Telescope Series Officina Stellare RiDK
Optical Design Astrograph
Mount Type None - Optical Tube Only
Warranty 1 Year Warranty
Glass Type Low Expansion Borosilicate Glass
Telescope Aperture 300mm (12 in.)
Telescope Focal Ratio f/8
Telescope Focal Length 2400mm
Optical Tube Outer Diameter 410mm
Optical Tube Weight 60 lb.
Tube Material Aluminum and Carbon
Tube Color or Finish Carbon Fiber
Finder Included None
Focuser Size 72mm (2.83")
Focuser Style Rack & Pinion
Manual or Electronic Focusing? Manual
Included Items

Included Items

  • 12" Riccardi Dall-Kirkham Astrograph with Full Carbon Athermal Truss Tube
  • 72mm Manual Focuser
  • Four Losmandy-Style Dovetails
  • Three Ventilation Fans
  • Mirror Heating
  • Manual Control on Both Mirrors
  • Manual Movement of Secondary Mirror
  • Black Fabric Shroud
  • Caps/Covers
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