TS-Optics RC 0.8x Corrector Reducer for Ritchey Chretien - big sensors

Codice articolo: TSRCRED-g2

The corrector and focal reducer is designed especially for Ritchey-Chrétien telescopes and shortens the focal length while correcting the image field at the same time.

Connection at the telescope side: M78x1 male thread - fits to the corresponding female threads of focusers
Connection on the camera side: M68x1 male thread and M48x0.75 male thread
Working distance is 55 mm from the M48x0.75 thread and 74 mm from the M68x1 male thread - if you unscrew the telescope connection adapter, the distance can be extended to 82 mm.
Diameter 74 mm - the corrector can be sunk into 3" focusers
The focal length is shortened by a factor of 0.8x and the aperture ratio is improved accordingly.
The corrector is suitable for all RC telescopes from TS-Optics, GSO, Astrotec, Omegon ... from 8" aperture. The requirement is a focuser with at least 74.5mm free aperture

TS 0.8x focal length reduction and image field correction for Ritchey-Chrétien telescopes
TS-Optics RC 0.8x corrector reducer provides a complete correction of the image field of RC telescopes together with a reduction of the focal length to 80 %. Usual telecompressors, such as the CCDT67 from Astro Physics, reduce the focal length without correcting the image field. The result is an image error (astigmatism) in the corners. The larger the sensor, the more pronounced the error.

The TSRCRED is specially designed for the image field of f/8 RC telescopes and therefore completely eliminates the errors.
The result is sharper and more pinpoint stars and easier focusing. This reducer is also the only one for full-frame cameras that can be used with our TS RCs with the large focusers up from 10", such as TSFOCR30S.

Astrophotographic results obtained with this equipment on Astrobin
Here you can find some astrophotographs made with this corrector/reducer: Link to Astrobin

The adaptation of the TSRCRED to the telescope:
The corrector already comes with the complete adaptation to the telescope, whereby the corrector is countersunk into the focuser. This saves valuable optical path and reduces the load on the focuser. The thread on the telescope side is a M78x1 male thread. This allows the corrector to be screwed directly into the TSFOCR30S and the focuser fits directly onto the M117x1 thread of the RC.

The original focuser of the large RC telescopes with the M117x1 connection on the tube has an M77x0.75 internal thread. With the M77a-M78i adapter, you can simply connect the corrector to the RC and the corrector is countersunk into the focuser tube.

The camera adaptation to the TSRCRED-G2:
The corrector also comes with a ready-made adaptation for cameras, with which you can easily achieve the correct distance.
55 mm from the M48x0.75 external thread:

This allows you to easily connect DSLR, system, or astro cameras with commercially available photo adapters.
74 mm from the M68x1 external thread:

The larger M68 thread is interesting for cameras with very large sensors or also for longer setups with off-axis guiders. This improves the illumination and gives you even more space for your own image train. Adapters to M48 or M54 are of course available.

Specifiche tecniche:

Type: Corrector and reducer for RC telescopes
Focal length reduction: 0.8x
Thread at the telescope side: M78x1 male thread - length 5 mm
Thread at the camera side: M68x1 male thread - length 5 mm and M48x0.75 - length 5 mm
Diameter of the corrector: 74 mm
Number of lenses: 3
Coating: Multi-coating and anti-reflective coating
Working distances from the M68 external thread: 82 mm when the adapter is unscrewed and 74 mm with telescope adapter screwed on
Working distance from M48 external thread: 55 mm