so yesterday after a long journey my new telescope arrived (TS 130 F7, 910 mm)
I wanted to test it immediately and started to mount things.
Long story short I was not able to reach focus with my camera (6200mm, with ZWO Filterwheel)
The reducer is the one at this link (TSAPORED075)
Form the technical description:
♦ The corrector can be used on all refractors with focusers from 2.5". The required back focus is 180 mm from the connection thread. Suitable adaptations via M68 are available.
♦ The working distance from the M48x0.75 thread is 55 mm. Ideal for astro cameras and DSLR/SLR cameras.
♦ The corrector offers another thread on the camera side, which allows you to extend the working distance to 105 mm
I ordered it with the support of TS consultants
We focused on the 55mm. According to ZWO, the train to have 55mm is Camera-Wheel-2mm adapter-16.5mm extender
Image is out focus with the focuser attached to the telescope, get worse moving away from it
At this point I removed the 16.5 mm extender from ZWO. Image still out of focus but better.
In the night i removed the extender on the reducer (see part 'a' in the image, which by the way is 55mm), and put the camera manually closer to the reducer. I reach focus.
At this point my guess is that the 55mm is not from the M48x0.75 but from the intermediate thread of the reducer (see the image, where part 'a' and 'b' split there is a thread (I think M68)
What is the meaning of the first sentence 180mm from the connection thread? the m68 thread of the telescope?
I am in contact with TS but I am happy to hear from you too
Edited by welluca, 22 September 2020 - 02:18 AM.