TS-Optics 10" Ritchey-Chrétien Pro RC Teleskop OTA - focuser freely selectable
TS-Optics RC Telescopes are made for astrophotographers. High-quality images of galaxies and nebulae with perfect stars to the edge without additional correctors are possible. The picture is brighter and more contrasted than, for example, by a Schmidt-Cassegrain with corrector plate. Professionals use RC telescopes and now this telescope system is also at your disposal.The advantages of the RC-telescopes at a glance
Hyperbolic primary and secondary mirror for a large fully illuminated field of view.
- Astrophotography with camera sensors up to 30 mm diameter
possible without corrector. For larger sensors, like full-frame size,
Teleskop-Service offers ready-to-use corrector solutions.
- 99% dielectric high-reflectivy coating on main and secondary mirror for an even brighter image.
- Significantly shorter cooling down time through open construction and active primary mirror ventilation.
- Internal baffles in the tube for even more contrast.
- High back focus for correctors, reducers and also binoviewers.
Better and sharper astrophotos without corrector with shorter exposure times. This is exactly what this RC telescope with astro cameras and SLR cameras even with full-frame sensors allows for. As a pure mirror system you can even use the infrared light. You achieve up to 25% shorter exposure times and sharper images than, for example, a comparable Schmidt Cassegrain telescope. With a focal length reducer you can increase the aperture ratio.
Spacers for the ideal back focus are included. You do not need extension sleeves, thanks to the spacers, the focuser is always in an optimal position, whether you are observing or photographing.
Even large camera sensors up to full format can be used. Even without a corrector, the field sharpness is already very good. It gets even better with RC correctors.Configure your RC with the focuser of your choice
We especially recommend two focusers. The focuser fit directly to the M117 thread of the tube.
Primary and secondary mirror of quartz glass
- SLPR3 - The affordable 3" Monorail standard focuser. We recommend the focuser for visual observation and for medium photo equipment, such as DSLR cameras.
The focuser already provides all the prerequisites, such as micro-reduction and bearing, superior to simple Crayford focusers. We recommend the focuser for accessories up to approx. 4 kg
- TSFOCR30S - 3" tooth-wheel drive focuser for heavy accessories. We recommend the focuser to all astrophotographers who use heavier equipment.The adjustment of the draw tube is made by a helical toothed wheel.This enables more accuracy and sensitive adjustment even at maximum load.
The focuser carries accessories up to 6kg without tilting. Optional motor focus, 360 ° rotation and screw thread on the camera side are a matter of course.
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%
The advantages for astrophotography
The TS RC astrograph 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.
Advantages 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
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 noticeable 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.
- TS 10" f/8 RC Astrograph - with steel tube
- Losmandy Level prism rails on both sides
- M117x1 extension sleeves
The 10 "Ritchey-Chretien is the ideal still transportable telescope for astrophotography and also well suited for visual observation.