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I did buy it when they first came on the market, so it's possible
something changed later. Strangely, I have to use the same arrangement
with my present Skywatcher 8" f5 Newt. The manual for the OTA says
nothing about how to achieve prime focus. This problem with my type
of OTA was discussed here on IIS a couple of weeks ago, in the beginners' astrophotography section, if I remember correctly.
There seems to be an epidemic of scopes unable to reach prime
focus without a load of messing about. How can the manufacturers
be so remiss.
raymo
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