Hi Alex & Jeremy, Thanks for your replies.
We had not wished to mention the manufacturer in case it was just our inexperience. However, Alex, you have nailed it in one - it is the SVBony.
We are using it in a Newtonian 130mm F5 scope with a Toupcam GP701200C td p { margin-bottom: 0cm; }p { margin-bottom: 0.25cm; line-height: 115%; }(marketed in Australia as Prostar). We think you have answered our question. It appears unlikely that its going to be much use. We would however say that reversing the elements has made an amazing difference so we will try some subs and see if we can get a reasonable result. Its worth a try. It might be worth a try with yours as well Alex.
Peter & Clare
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