Astronomy Specialist

OFFICINA STELLARE VELOCE RH200 MARK II-AT f/3

$13,599.00 - Sold Out

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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 extremely fast f/3 focal ratio with a flat imaging field and a very large diameter. 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 extra-solar planet search surveys.


OPTICS

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 full aperture corrector plate and it is completed with a two element flattener group situated before the focal plane. This complex optical system guarantees the astroimager a greater off-axis correction, even with a very 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.

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.


MECHANICS

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 unique features of this extraordinary instruments are:

  • New athermal mechanic, ready to work in any temperature condition
  • New nano coating, better transmission and resistance to moisture. Easy to clean
  • More accessories provided: rings, Losmandy dovetail and upper dovetail
  • New mechanical zero tip tilt installed
  • New stronger lens cell’s mechanic
  • New baffle design to avoid any straylight

The RH200 MKII-AT offers a new tip tilt system, designed for heavy payloads. It can be regulated with 2 bronze cursors. This tip tilt system is highly recommended for experienced users.

The RH200-AT has a new mechanical zero with a classic 4 points tip tilt system. This means, if you need to return to the starting point after a bad regulation, it is now as easy as turning a screw. The classic tip tilt system is the best one for most setups.

Officina Stellare Veloce Tip-tilt system

 

Optical design

Riccardi-Honders

Entry pupil

200 mm

Focal length

600 mm

Focal ratio

f/3

Linear obstruction

55%

Fully corrected and
illuminated filed

42 mm - (designed for 24x36 mm chips (42 mm diagonal), but works also with 36x36 mm chips (51 mm diagonal), with a very little vignetting at the corner of the frame, easy to correct with a proper flat field

Weight

9 kg

Backfocus extraction

~ 65 mm

SKU

VELRH200ATMK2

 

 

  • FF72 focuser
  • Tube rings
  • Losmandy dovetail bar
  • Upper dovetail bar
  • Carbon dew shield
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