The
Ri
ccardi
L
arge
A
strograph, RiLA, is the first of its kind by the Italian
optical design engineer Massimo Riccardi.
The new optical design is the result of a modification of the Harmer-Wynne
scheme, and is made up of an aspherical primary mirror, a spherical secondary,
and a lens group in the back.
The RiLA is corrected in the near-infrared with over 80% of the energy
focused into a spot with a 4-6 micron RMS.
The resulting telescope is extremely compact and lightweight.
The main design goal of the RiLA was to cover a VERY WIDE CORRECTED
FIELD with a fast F-ratio.
SPECIFICATIONS:
Optical set:
RiLA
, two mirrors and back lens group
Clear aperture: 400, 600 (2011) and 800 (2012) mm
Focal ratio: f/3.8 (400 mm), f/3.7 (600 mm)
Corrected field: 60 mm (400 mm), 90 mm (600 mm)
Spot Size inside full circle: 4 to 6 microns RMS
Weight: 41 kg / 90.4 Lbs (400 mm)
Lenght: 875 mm / 34.5” (400 mm)
Max outside diameter: 590 mm / 23.2” (400 mm)
Standard configuration:
zero expansion carbon truss tube design, four Losmandy type dove-
tails, three fans, mirror heating, TC-1 controller, shroud and cap covers.
Main optional accessories:
digital focusers, finderscope, additional dovetail bars, customized
imaging train parts.
