Officina Stellare - RiLA 400 f/5.2 Standard Glass Aluminum-Carbon Optical Tube

The Officina Stellare Rila Series are known for having a fast focal ratio with a wide corrected field of view while maintaining a lightweight body. The apertures range from 300mm all the way to 800mm. The Rila 400 has a f/5.2 focal ratio.

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.

A wide range of apertures is available, starting at 300mm and topping out at 800mm. The optics are housed in a zero expansion aluminum carbon tube system and there are Losmandy style dovetails mounted on the truss for mounting versatility. 

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