Won’t focus

[Mr Jack Martin]

I am using a Bresser AR102s 102/600/f/5.9 refractor for visual.
I am having to use 2 spacers screwed into to the eyepiece barrel to achieve focus!
Questions;
1. Has anyone had the same issue with this or any other refractor?
2. What’s causing this?
2. Is there another fix apart from spacers?
Any thoughts,
Jack

• This topic was modified 15 hours, 29 minutes ago by Mr Jack Martin.

[Mr Giovanni Di Giovanni]

If I understood correctly, I would say that the travel of the eyepiece holder tube, i.e. the focuser, is too short for the diverter (prism or mirror) not to be inserted. It is obvious that without a diverter, the focal plane remains very far out in relation to the extrusion of the eyepiece holder tube. I have the same problem with a Russian telescope. That is if I have not misunderstood.
Saluti
Giovanni

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