This telescope is checked, measured and adjusted if necessary before delivery.

How we adjust: About us

Omegon Ritchey-Chretien Pro RC 254/2000 OTA incl. 3x M90 extension sleeves

Omegon Ritchey-Chretien Pro RC 254/2000 OTA

Next night, next level: Omegon RC telescope for astrophotographers
Are you looking for a good telescope for astrophotography? With the Omegon Ritchey Chretien telescopes you enter the quality level for your astrophotos. The Omegon RC telescopes offer you a large and comfree field of view. Perfect for round stars to the edge. Find out why an RC telescope pays off for the astrophotographer and why the pros also use it.

The advantages at a glance:

Hyperbolic mirrors: extremely sharp image, large image field without correctors
Mirror made of quartz: for stable focus, refocusing is not necessary
High Reflection: 92-94% dielectric mirroring for bright, high-contrast observations and astrophotos
Fast cooling time, thanks to open design.
Electric fans for even faster cooling time (at 10 ")
3x extension sleeves already included 2x 25mm, 1x 50mm


Hyperbolic mirrors for a better picture:

The RC telescopes have hyperbolic main and secondary mirrors. No spherical mirrors, as in Schmidt-Cassegrain systems.

The big idea will be to your advantage: Better and sharper astrophotos with a larger usable field! For APS-C chips even without corrector ultra-sharp. Until a few years ago, this technique was hardly affordable. The new Omegon RC telescopes are now available for every hobby astronomer.

Photograph without corrector:

Use your DSLR or astro camera on your optics. You do not need another proofreader, for comfree and needle-fine stars to the edge. In the 6 "RC are chips in the APS-C format can be used, for example, a Canon EOS or similar In the 8" and 10 "models you even use FullFrame chips with 24x36mm without any correction.All fit professional DSLR cameras and countless astro cameras, and if you still wish to photograph in medium format, ask us for the right solution.

Main mirror made of quartz
As an experienced astrophotographer, you have certainly experienced this: a focus that likes to change with long-exposure shots. That annoys you! Your advantage with this model: two quartz mirrors. They have almost no thermal expansion, provide a fantastic picture and keep the focus stable throughout the night.

Steel tube for stable focus and high contrast
In addition to a good mirror, the tube made of steel plays a decisive role for good astrophotos. Compared to an aluminum tube, this Omegon RC has a 50% reduced focus shift. Exactly set stray light panels also provide a high contrast.

Large free opening: 3 "eyepiece
The rear end is particularly important: A ball-bearing 3 "linear Crayford extension gives you enough space to illuminate even large-format image fields without vignetting.A hybrid of Crayford and guide rail reveals the ease of a Crayford extract and the stability of a good Rack & Pinion extract.

Always the right object orientation: focuser fully rotatable
Reduction to 2 "and 1.25" with integrated spring-ring clamping
Find the exact focus sensitively: 1:10 Reduction for minimum focus adjustment
Dash scale: so you can quickly find the focus
High stability: no tilting - so the camera sits exactly on the optical axis and the image remains sharp
Better picture than with a SC telescope
First, an RC telescope is designed completely differently than a classic SC or Maksutov telescope. Without a correction plate, it is an open system that adapts to the ambient temperature faster than an SC telescope. Due to the missing plate at the front, the telescope also achieves brighter pictures without the danger of reflections. Ritchey-Chretien systems are the most highly corrected two-mirror telescopes. The field and edge sharpness is impressive. So it is no wonder why practically all major research telescopes in the professional careers use these optics.

Now they are affordable
Making hyperbolic mirrors is a science and an art. Until a few years ago, the RC telescopes were therefore among the most expensive telescopes in the world. Only international institutes used them for research. But now this technique is also available for experienced amateur astronomers.


Technical specifications:

optics
type reflector
Type Ritchey-Chretien
Opening (mm) 254
Focal length (mm) 2000
Aperture ratio (f /) 7.9
Resolution (arc seconds) 0.45
Limit size (mag) 13,8
Light collection capability (-fold of a 7mm pupil) 1320
Max. Sensible enlargement (-fold) 508
Tube weight (kg) 15,7
Tube length (mm) 735
steel tube material
Tube diameter (mm) 294
reflector
Main mirror type hyperbolic
Mirrors Material Quartz
Catch level obstruction (% of opening diameter) 18
Main mirror material quartz
Mirrors diameter (mm) 85
Surface quality (lambda) 1/12
Reflectance (%) 99
Okularauszug
Type Monorail
Connection (eyepiece side) (inch) 2
Reduction 1:10 fine drive
mount
Mounting type without mount
type OTA
GoTo control no
no tracking
Included accessories
Dovetail Vixen Style
General
Series Pro RC
application areas
Moon & Planets yes
Fog & galaxies yes
Nature observation no
Astrophotography yes
Sun not recommended (only with a suitable solar filter)
Recommended for ...
beginners no
advanced yes
Savvy amateurs yes