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Officina Stellare RiFast Truss-Tube Astrographs

Officina Stellare RiFast Truss-Tube Astrographs
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Product Code:  OSRIF400
Brand:  Officina Stellare
Telescope Type:  Riccardi RiFast Astrograph

Officina Stellare


RiFast. A big, beautiful telescope at f/3.8. What else to say?

Devoted to astrophotograpy, the RiFast family has an unique optical scheme, proprietary of Officina Stellare, another creation of our master optician, Massimo Riccardi. The three-lens field flattener is the real masterpiece of this telescope. The primary mirror is aspherical and the secondary mirror is spherical. A precise design choice to make collimation easier.

Diffraction-limited over a wide and flat field, the RiFast design will push any camera to its limits... and will do it FAST! The extraordinary f/ ratio allows a higher productivity per night, a significant factor for surveys, SN search, asteroid control, and many other fields of modern astronomy.

The central obstruction is about 50%, but still smaller than similar designs, that simply can't compete under any point of view. The visual contrast is very good, thanks also to the special ultra-dark paints we use.

The corrector group is very close to the focal plane, so chromatic aberration is undetectable.

Model RiFast 400 RiFast 500 RiFast 600 RiFast 700 RiFast 800
Entry Pupil Diameter 400mm (16") 500 mm (20'') 600 mm (24'') tbc 800 mm (32'')
Focal Ratio F/3.8 F/3.8 F/3.8 tbc F/3.8
Focal Length 1520 mm (60'') 1900 mm (75'') 2280 mm (90'') tbc 3040 mm (120'')
Linear Obstruction 55% 55% 55% tbc 55%
Fully Corrected and Illuminated Field 70 mm 80 mm 80 mm tbc 80 mm
Weight 40 Kg 85 Kg 105 Kg tbc 180 Kg
Back Focus Extraction about 240 mm (9.5'') about 240 mm (9.5'') about 240 mm (9.5'') tbc about 240 mm (9.5'')

 

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