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Focus distance help required
Hi everyone,
I need some help and hoping someone here will know the answer.
I have a Takahashi fsq-85 and I have replaced the focuser with an Esatto motor focuser which has only 30mm of travel. I am coupling it with a QHY 268c. I do have the Tak flattener 1.01x which I can use, but that was really only purchased because I formerly had a full frame camera. The fsq-85 is supposed to be good for APS-C sensors without the extra flattener.
The point of this thread though is that both with and without the flattener I can't bring the system to focus because there is insufficient travel. I do have 19mm of M54 screw thread extension tubes between camera and Esatto and the attached shows Acrux with the focuser fully extended.
Obviously I need extensions but we're not talking about a little off here, as you can see Acrux is massively way off focusing. I can have an extension piece made, but I do need to know how long it should be.
Is anyone using this combo and can therefore let me know how you reach focus?
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