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Astronomy > Telescopes > TS Optics > TS Optics Ritchey-Chretien RC 304/2432 Pro Carbon OTA
Product no.: 56288

Ritchey-Chretien RC 304/2432 Pro Carbon OTA

$ 5,100.00 incl. VAT plus shipping costs
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Product description

Most large professional telescopes are built according to the Ritchey-Chrétien principle. Until recently, these telescopes were unaffordable for amateurs, but they are becoming increasingly attractive in terms of price.

RC telescopes are ideal for astrophotography. Of course, an RC telescope can also be used for visual observation. Here, too, the large corrected field of view is noticeable.

The advantages of RC telescopes at a glance:

  • Hyperbolic primary mirror and secondary mirror for a large, fully corrected field of view.
  • Astrophotography with camera sensors up to 30 mm in diameter is also possible without a corrector.
  • 99% mirror coating and dielectric coating on the primary and secondary mirrors for an even brighter image.
  • Significantly faster cooling time thanks to open design and active primary mirror ventilation.
  • Large back focus for correctors, reducers or even binocular attachments
  • High-quality 3" MONORAIL focuser with M69x1 threaded connection and 2"/1.25" plug-in connection.

Astrophotography with the RC telescope:

  • Thanks to the large corrected field of view of the RC telescopes, you can take photographs with SLR cameras up to APS-C format without a corrector. For shots directly in focus, you will need the M117x1 extension tubes, which are included in the scope of delivery. These are screwed between the telescope and the focuser.
  • The generous back focus also allows the connection of correctors, which we recommend when using full-frame sensors. You can also connect a focal length reducer to further increase the light intensity of the RC.
  • You can clamp the camera directly onto the 2" barrel extension or screw everything together using the M69x1 internal thread of the focuser.
  • The 3" MONORAIL focuser – more than a Crayford: The Monorail focuser combines the smoothness of a Crayford focuser with the rigidity of a rack and pinion focuser. This makes astrophotography a success.

Primary mirror and secondary mirror made of quartz glass with 99% mirror coating and dielectric quartz protective layer: Quartz glass does not change its properties with temperature differences. If the temperature drops slowly during exposure, other mirror materials, such as Pyrex, will deform and cause the focus to shift. This problem does not occur with quartz glass mirrors. The focus is therefore maintained better, which is very important for long exposures. Both mirrors are 99% mirrored. The image is visibly brighter than with telescopes with only 90% or 94% mirroring.

The advantages of RC optics over other systems: Maksutov and Schmidt-Cassegrain optics have spherical mirrors and therefore require downstream optics (correctors) to make a large field usable. Maksutovs are usually so light-weak that they are not suitable for astrophotography. RC telescopes, on the other hand, have hyperbolic primary and secondary mirrors. The RC system is a pure reflection system that does not require any lenses in the optical path. This allows photography down to the infrared range. The image is brighter and exposure times are shorter. In addition, RC telescopes do not have a dew-prone Schmidt plate on the front.

Carbon Fibre Tube

This apochromat is well suitable to visual observing but was, in fact, developed especially for astrophotography. Use the advantages of a carbon fibre tube: it is particularly light and so even perfectly suitable for using on smaller mounts. The tube also offers a very high inherent stability and only minimal thermal expansion. These advantages are particularly useful for astrophotography, as the focus remains stable for the whole night. The dew shield is also carbon fibre and can be extended easily. In addition, the tube is lined with black felt.

TS Optics is a brand of Teleskop-Service.

Specifications

Optics


Type
Reflector
Type of build
Ritchey-Chretien
Aperture (mm)
304
Focal length (mm)
2432
Aperture ratio (f/)
8
Resolving capacity
0,38
Limit value (mag)
14,2
Light gathering capacity
1890
Max. useful magnification
608
Tube weight (kg)
18
Tube length (mm)
890
tube diameter (mm)
356
Tube material
Carbon
Coating
SiO2
Tube construction
Full tube

Reflector


Secondary mirror diameter (mm)
150
reflectivity
99
Ventilation for central mirror
yes
Secondary mirror obstruction
51
Main mirror´s construction
hyperbolic
Secondary mirror material
Quartz
Primary mirror - Material
Quartz

Focuser


Backfocus (mm)
127
Type of build
Monorail
Connecting threaded socket (camera-side)
M69x1
Connection ( to eyepiece)
2
Ring clamp
yes
Gear reduction
1:10 fine focusing
Rotating
yes
Motorized
optional

Mount


Mounting type
no mount
GoTo control
no
Type of build
OTA

Included accessories


Eyepiece adaptor
2" / 1.25"
Prism rail
Losmandy-Style
Tube clamps
yes
Extension tubes
yes
Finder scope
without
Deviating optics
no

Area of application


Astrophotography
yes (very good)
Moon & Planets
yes
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
no
Advanced
yes
Observatories
yes

Product safety

Manufacturer: Teleskop-Service Ransburg GmbH, Von-Myra-Straße 8, 85599 Parsdorf, DE, www.teleskop-express.de

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*All prices include VAT plus shipping costs.

TS Optics Ritchey-Chretien RC 304/2432 Pro Carbon OTA

Monorail focuser (a further development of the Crayford focuser)

TS Optics Ritchey-Chretien RC 304/2432 Pro Carbon OTA

Extension tubes like this are often useful for achieving focus.

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