With this adaptor, you can convert your 50 mm finder into a mini guiding scope, i.e. a compact guide tube.
The entire rear plate of the finder is replaced. The short adaptor has a clean stop edge. The focus is adjusted by turning the finder lens.
The adaptor also fits 50 mm viewfinder telescopes with a 90° view. In this case, you have a working distance of approximately 57-61 mm from the T2 thread, so you can also use autoguiders with a longer working distance or special tracking eyepieces. You can even focus on the eyepiece side using T2 focusers.
With straight-view finder telescopes, the working distance is only 7-11 millimetres. The adaptor is particularly useful for adapting autoguiders with 1.25" housings, such as the ZWO ASI120 MINI. You will also need an adaptor from T2 to 1.25", and then you can easily adjust the focus by moving the autoguider.
TS Optics is a brand of Teleskop-Service.
