Astronomy Specialist

OFFICINA STELLARE RiFAST 400 F/3.8

SKU: OS-RIFA400SGA

Style

 

The RiFAST 400 is an astrograph with a new revolutionary optical design proprietary of Officina Stellare, designed by Massimo Riccardi.

 

OPTICAL DESIGN

The primary mirror is aspherical and the secondary mirror is spherical, a precise design to make collimation easier. The RiFAST includes a 3 elements flattener of which 2 are aspherical and it is placed near the focus position to avoid any chromatic aberration.

The telescope is a native f/3.8 with a flat field up to 70mm. The scope has the option to be used with a dedicated 0.78x reducer (XTFR078), bringing the focal ratio down to f/2.96.

 

MECHANICAL PERFORMANCE 

The collimation is stable as ever before due to an improved mechanical design. Every RiFAST is tested under the sky and is tested in Officina Stellare's factory, ensuring a perfect collimation.


The secondary mirror can be motorized for focusing, leaving the imaging train fixed as screwed to the backplate, a good solution for heavy cameras and accessories. It is also possible to install a tip-tilt mechanism. 
Remote observers can upgrade their RiFAST with optional primary mirror shutters to avoid moisture and dust deposit on the telescope’s mirror when not in use.

 

Specifications

 

Optical design

RiFast

Diameter

400 mm

Focal length

1520 mm

Focal ratio

f/3.8

Linear obstruction

55%

Fully corrected and illuminated field

70 mm

Weight

40 kg

Backfocus extraction

~ 240 mm

SKU

RIFA400