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TS-OPTICS
Available Upon Request
This category includes products which are not kept in stock and for some reasons -which don’t depend on our company- can’t be available in less than 14 days. Specifically, this category includes new products thar are pre-advertised by manufacturers, however they are not available in Greece yet. You can pre-order these items with a special preferential price. If the estimated arrival date of this product is already known, then the estimated date will be written above the indication “AVAILABLE UPON REQUEST”.
Most large professional telescope are constructed according to the RC principle. Until recently, these telescopes were unaffordable for amateurs. RC telescopes from Teleskop-Service are primarily aimed to amateur astronomers with photographic interest. These telescopes are perfectly suited for high-resolution astrophotography. Of course, an RC can also be used for visual observing. Here, the large corrected field of view is noticeable, too. In total, the stars are sharper than, for example, in a Schmidt-Cassegrain.
The advantages of the TS-Optics RC Telescopes at a glance:
Astrophotography with the TS-Optics 8" RC telescope
Better and sharper astro images without corrector with shorter exposure times: Exactly that is made possible by using this RC telescope with astro cameras and SLR cameras up to APS-C sensors. As a pure mirror system, you can even use the infrared light. You can achieve up to 25% shorter exposure times and a sharper image than, for example, a comparable Schmidt-Cassegrain telescope. With the focal reducer CCD47, you can even increase the focal ratio to fast f/5.36.
Spacers for the ideal back-focus are supplied: You don´t need extension tubes, thanks to the spacers, the focuser is allways in an optimal position, whether you observe or photograph.
Even large camera sensors up to full-frame size can be used: Even without corrector, sharpness in the field is already very good. With the RC correctors, developed by Teleskop-Service, it becomes even better.
The 2" MONORAIL focuser - more than a Crayford
The Monorail focuser combines the ease of movement of a Crayford focuser with the stiffness of a rack-and-pinion focuser. Thus astrophotography becomes a success.
Primary and secondary mirror of quartz glass with 99% reflectivity and protective dielectrical quarz layer
Quartz glass does not change its dimensions if temperature changes. When the temperature changes slowly during an exposure, other mirror substrates, like Pyrex, tend to a deformation of the mirror and thus to a shift of the focus. This problem does not exist for mirrors of quartz glass. Thus the focus is better maintained which is very important for long exposures. Both mirrors are coated with 99% reflectivity. The image is obviously brighter than the one of telescopes with only 90% or 94% reflection layer.
The advantages of TS RC telescopes for astrophotography
The TS RC astrographs are true Ritchey-Chrétien telescopes. Maksutovs and Schmidt-Cassegrains have spherical mirrors and need correctors for making a large field usable. With Schmidt-Cassegrains, you can see the aberrations in the field even when working visually. Most times, Maksutov-Cassegrains are so slow that they are not suitable for astrophotography. RC telescopes have hyperbolical primary and secondary mirrors. They are more difficult to manufacture, but offer a significantly sharper field with less aberrations throughout the field.
Why is the RC Telescope superior to Schmidt-Cassegrain telescopes with correctors:
Celestron EHD or Meade ACF telescopes need a corrector. Additionally, these telescopes have a Schmidt plate at the front side which is prone to dew. The RC is a pure reflection system without lenses in the light path. Thus you can use the complete light even in the infrared range. The image is brighter and the exposure times get shorter. The field of an RC telescope is coma-free by design and relatively flat.
No shifting problem with TS RC telescopes
Telescopes with focusing via movable primary mirror often suffer from the "shifting problem". The image shifts while focusing or even jumps. By now, Meade and Celestron have the problem under control, but the effect is noticable nonetheless. TS RC telescopes do not have this problem, as their primary mirror is fixed. Focusing is done via a high-quality focuser. An additional advantage is the optimal distance from primary to secondary mirror. This gives you the guarantee of the best possible image. If the primary mirror moves relatively to the secondary, you will practically never have the optimal distance.
| Net Weight (g) | 8750 |
|---|---|
| Optical design | Ritchey-Chrètien Reflector |
| Aperture (mm) | 203 |
| Focal length - F (mm) | 1624 |
| Focal ratio (f/) | 8 |
Specifications:
All orders we receive until 15:00 concerning products in our warehouse, processed on the same day
Well-trained scientific and technical personnel are available to you at any time, to solve the questions and concerns about your equipment.
If you are not satisfied with the product you received, you can return it within 14 days of receipt.
Experience you can trust. Planetarium of Thessaloniki is the largest supplier of astronomy goods in the Balkans
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