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The Takahashi FSQ106 is a wonderful imaging scope but suffers from severe back-focus limitations. For the best CCD images, it is very helpful to have a digital focuser and the FLI DF2 is the thinnest one for which I aware that is FocusMax compatible.
When you combine the DF2 and a FLI CFWx filter wheel (x=1, 2,3,4), you get a very thin arrangement that consumes minimal backfocus.
In order to accomplish this mating I designed and fabricated a three part adaptor set as shown in the pictures above. Everything is machined out of aluminum and is painted flat-black to reduce internal reflections. Since anodizing is reflective in IR, flat black paint actually works better.
I can provide such "FSQ-FLI-SBIG" sets for a fair price. If interested contact me at:
As a final comment, for using this with an FLI camera, the SBIG camera adaptor is not needed. I can supply the two piece (all FLI) or three piece (FLI CFW/DF2 to SBIG) sets.
I also have the plain SBIG camera to FLI Filter wheel adaptor: