Officina Stellare 400mm f/5.2 RiLA Astrograph - Ceramic Optics - Full Carbon Tube

Officina Stellare 400mm f/5.2 RiLA Astrograph - Ceramic Optics - Full Carbon Tube
Item # OF-RILA400CGC
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  • The Officina Stellare 400 RiLA Astrograph is a fast telescope with a wide corrected field of view; perfect for imaging with today's large CCD sensors!
  • The 15.75" f/5.2 RiLA has a very simple optical system consisting of an aspherical primary and a spherical secondary, plus a special corrector at the back near focus. The upgraded near zero expansion ceramic optical set is easy to collimate and produces high resolution images across a wide field.
  • The Full Carbon package upgrades the standard carbon/aluminum truss to a full carbon, athermal truss.
  • Back focus is 280mm, and the spot size is very small, allowing diffraction limited performance across a 105 mm field.
  • This OTA package includes a 72mm FineFocuser, four Losmandy-style dovetail bars, manual control on both mirrors, a black fabric shroud and caps.



Officina Stellare 400 RiLA Astrograph

with Near Zero Expansion Ceramic Optics and Full Carbon Truss

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.

One of the reasons Officina Stellare is so popular today is because they listen to their customers. In fact, the RiLA series of astrographs was created because customers asked for a fast telescope with a very wide, corrected field of view. They wanted something that didn't weigh a ton, but that would accept all of the imagers, rotators, focusers, guiders, and other equipment that makes up the imaging train used by today's astronomer.

Once Officina Stellare decided they would make this dream telescope a reality, they put Italian optical designer, Massimo Riccardi, on the job. Riccardi wanted to create a telescope that had the following characteristics:

  • It had to be a fast system.
  • The design needed to be compact and lightweight for its aperture.
  • It would have the least number of surfaces possible while still producing a large corrected field.
  • The secondary obstruction would be as small as possible.

These features were made a reality and then some with the creation of the Officina Stellare RiLA (Riccardi Large Astrograph) Series. The design, which is a modification of the Harmer-Wynne, has an aspherical primary and a spherical secondary. A special corrector is placed just before focus. The RiLA is corrected in the visible near IR range, with more than 80% of its energy focused in a 4-6 micron RMS spot.

The Officina Stellare 400 RILA Astrograph has an aperture of 15.75" and a focal ratio of f/5.2.  The upgraded ceramic optics are housed in a full carbon fiber truss tube, and there are 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. The mirrors can be heated to keep dew at bay, and depending on the package or accessories you choose, most everything can be electronically controlled via the TC-1.


Officina Stellare 400mm f/5.2 RiLA Highlights…


  • Aperture: 400mm (15.75")
  • Glass:  Near Zero Expansion Ceramic
  • Focal Ratio: f/5.2
  • Focal Length: 2080mm
  • Fully Corrected & Illuminated Field: 105 mm
  • Full Field: 2.8°
  • RMS Spot Size @ 26 mm Off-Axis: 4.8 micron
  • RMS Spot Size @ 52 mm Off-Axis: 6.8 micron
  • Back Focus: 280 mm
  • Obstruction: 52%
  • Truss: Full Carbon Athermal Open Truss.
  • Easy Alignment: Specially designed mirror cells and spherical secondary are easy to align.
  • Small Spot Size: For wide field, high resolution images.


This RiLA Package Includes…


  • 15.75" Astrograph with Ceramic Optics in Full Carbon Truss Design
  • 72mm FineFocuser
  • Two Losmandy-Style Dovetails
  • Three Ventilation Fans
  • Mirror Heating
  • 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 RILA
Optical Design Astrograph
Mount Type None - Optical Tube Only
Warranty 1 Year Warranty
Glass Type Near Zero Expansion Ceramic Glass
Telescope Aperture 15.75"
Telescope Focal Ratio f/5.2
Telescope Focal Length 2080mm
Tube Material Full Carbon Athermic
Tube Color or Finish Carbon Fiber
Finder Included None
Focuser Size 72mm (2.83")
Manual or Electronic Focusing? Manual
Included Items

Included Items

  • Officina Stellare 15.75" f/5.2 Astrograph with Ceramic Optics in a Full Carbon Truss
  • 72mm FineFocuser
  • Four Losmandy-Style Dovetails
  • Black Fabric Shroud
  • Caps
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