TS 0.8x Focal Reducer and Field Flattener for Ritchey-Chrétien telescopes
Telescope Service offers you a complete correction of the image field of RC telescopes while simultaneously reducing the focal length to 80%. Pure 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 image errors. The result is sharper and more point-like stars and easier focusing. This reducer is also the only one for full format that can be used with our TS RCs from 10" with the large extensions, such as TSFOCR30S.
Astrophotographic results achieved with this accessory on Astrobin
Here you can find some astrophotographs taken with this corrector/reducer: Link to Astrobin
Adapting the TSRCRED to the telescope:
The corrector ships with complete adaptation to the telescope, whereby the corrector is sunk into the focuser. This saves valuable optical path and does not put so much strain on the eyepiece focuser. The connection thread on the telescope side is an M78x1 external thread. This means that the corrector can be screwed directly into the TSFOCR30S and the focuser fits directly onto the M117x1 thread of the RC.
The original focuser of the 10" and larger RC telescopes which connects top the telescope via an M117x1 connection, has an M77x0.75 internal thread. With the M77a-M78i adapter you can simply connect the corrector to the RC and the corrector is sunk 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.
Back Focus Distance
- 55 mm from the M48x0.75 external thread: This allows you to easily connect DSLR, system or astro cameras using standard photo adapters.
- 74 mm from the M68x1 external thread:
The larger M68 thread is interesting for cameras with very large sensors or for longer setups with off-axis guiders. This improves illumination and gives you even more space for your own image train.
Adapters to M48 or M54 are of course available.