Here we have something different. You may never have seen one of these gadgets before.
Its a focusing aid which attaches to the back of your telescope in place of your camera, and is particularly suitable for SC and Maksutov scopes, and DSLR cameras. It uses no power, and there are no wires or cables to worry about.
It enables you to visually reach perfect focus by means of a Ronchi grating. Unlike focusing with a Bahtinov or Carey Mask which can be fiddly and inexact at times, this little beauty will give you perfect focus over and over again.
When all done, its simply a question of sliding it out of your visual back and sliding your camera back in.
It comes with full instructions, and a S&T Test Report.
For sale at $150.00 inclusive of postage and insurance to anywhere in Australia.