Astronomy Specialist


$21,753.00 USD

Officina Stellare

Riccardi-Honders astrograph

300 mm


900 mm

28 kg


The ultra fast Riccardi-Honders astrograph represents the only true innovation in optics in the past few years. Born from the intuition of Italian designer Dr. Massimo Riccardi, as a variant of the original Honders design, this new configuration combines the ultra fast f/3 focal ratio with a flat, very large diameter imaging field. In addition to this amazing optical performance, the Veloce RH Series instruments are distinguished by an impressive compactness, unique in its kind, making it very easy to transport and easy to install on typical amateur mounts. The Veloce Series of telescopes are the perfect instruments for those astroimagers who are searching for a very large corrected field.

The very fast focal ratio allows for the use of very narrow band filters keeping exposure times short, while the widest possible imaging field greatly facilitates the realization of variable stars, asteroids or extrasolar planet search surveys.

The Officina Stellare Veloce RH300 is compatible with the ultra-accurate Esatto 3.5" LP low profile robotic microfocuser with the additional PL3600361 adapter.


The back surface reflection of the primary mirror (called Mangin) is the main characteristic distinguishing the Riccardi-Honders optical design. Combining the reflecting and double refracting action (the incoming light passes through the full thickness of the primary mirror twice) of this element, it is possible to obtain a greater optical correction while maintaining the instrument extremely compact. The optical design includes a lens and a two element flattener group situated before the focal plane. This complex optical system guarantees the astroimager a greater off-axis correction, even with an ultra fast F/3 focal ratio.

Getting closer to perfection, the Veloce now uses an innovative Nano Coating® which has an amazing resistance to dust and moisture and a better transmission over a wider wavelength bandwidth range, a feature appreciated by professionals.

The Veloce RH 300 AT is still transportable with a weight of only 28kg and convenient to use due to the compact size and great mechanic. A 3 fan primary mirror helps to reach the right working temperature.

An interesting fact about the RH Veloce: since the double frontal lens is convergent, the Mangin mirror is smaller than the "nominal" diameter of the scope, while the meniscus itself is bigger than the nominal diameter, ensuring a good illumination over the wide field of view of such scopes. For example, the 200mm model has a 220mm meniscus and a 190mm primary mirror. The secondary mirror is a separated piece of glass, or it is made coating the middle of the meniscus depending on the model. For this reason, "entry pupil" is mentioned and not "primary mirror diameter" for these instruments.


Due to the most recent optical and mechanical design software used during the latest development, the Veloce Series has a fixed focal position versus temperature shift during imaging sessions, an essential condition when using instruments with such a fast focal ratio. All the mechanical parts are produced using the finest materials available only, such as special lightweight aluminum/Ergal, stainless steel and bronze. The tube is designed and optimized with CAD and computer support modelling to achieve the best rigidity and lightness. All parts are full CNC machined to guarantee the best possible precision. The high resistance anodization is chosen for unbeatable resistance to environmental conditions. Finally, the good extraction of focal plane position allows to use complex imaging trains, both with CCD, CMOS or the more popular digital reflex cameras.

The corrected and illuminated field is 60mm. If you need to compensate the small misalignment in the imaging train, it is possible to adjust the planarity of the focal plane with 4 screws located on the back plate. 


Optical design Riccardi-Honders, flat-field
Entry pupil 300 mm
Primary mirror diameter
280 mm
Front corrector lens diameter
320 mm
Focal length
900 mm
Focal ratio f/3
Linear obstruction 55%
Fully corrected and
illuminated field
60 mm 
Dimensions (mm) 652 (with dew shield) L x 376 Ø
Weight 30 kg
Backfocus from back plate 180 mm
RMS polychromatic spot size Max. 7 microns at field edge



  • Losmandy dovetail bar
  • Upper Losmandy bar
  • Dew shield


    $21,753.00 USD

    Optical design

    Riccardi-Honders astrograph

    Image circle

    Focal ratio



    300 mm

    Focal length

    900 mm

    Optical thickness



    Colour or Mono

    Pixel size

    Sensor dimensions


    Sensor diagonal

    Quantum efficiency

    Read noise

    Fullwell capacity

    Bit depth


    Camera backfocus

    Filter size

    Filter size

    Bandpass (FWHM)

    Bandpass (FWHM)

    Glass thickness

    Mount type

    Payload capacity

    Latitude range

    Dovetail saddle

    Slew speed


    Periodic error correction

    Counterweight shaft

    Azimuth adjustment range

    Internal diameter

    Illuminated diameter

    Compatible telescope external diameter


    28 kg




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