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Officina Stellare RiDK Truss-Tube Astrographs

Officina Stellare RiDK Truss-Tube Astrographs
Price:  Please Call to Confirm the Price(Inc. 20% VAT)

Product Code:  OSRIDK400
Brand:  Officina Stellare
Telescope Type:  Riccardi Dall-Kirkham

Officina Stellare

An evolution of the Dall-Kirkham design, the RiDK is probably the most "universal" family in our catalog, and the most affordable. With a f/7 native focal ratio, the RiDK (Riccardi Dall-Kirkham) represents the new reference point for all modified Dall-Kirkham instruments available on the market. The unique experience and creativity of Massimo Riccardi, Chief Optical Designer at Officina Stellare, created this new family of telescopes. with superior performance and image quality.

The results are simply amazing: a telescope that offers a wide, flat focal plane (more than 65 mm in diameter, even in the smallest model!). A wide focal plane that is diffraction limited over a wide spectral range.

Since the corrector group is close to the focal plane, chromatic aberration is undetectable.

Model RiDK 400 RiDK 500 RiDK 600 RiDK 700 RiDK 800
Entry Pupil Diameter 400 mm (16'') 500 mm (20'') 600 mm (24'') 700 mm (28'') 800 mm (32'')
Focal Ratio F/7 F/7 F/7 F/7 F/7
Focal Length 2800 mm (112'') 3500 mm (140'') 4200 mm (165'') 4900 mm (193'') 5600 mm (220'')
Linear Obstruction 48% 48% 55% 55% 55%
Fully Corrected and Illuminated Field 70 mm 80 mm 80 mm 80 mm 80 mm
Weight 40 Kg 85 Kg 105 Kg 140 Kg 180 Kg
Back Focus Extraction about 240 mm (9.5'') about 240 mm (9.5'') about 240 mm (9.5'') about 240 mm (9.5'') about 240 mm (9.5'')


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