interesting to see, anything that has the potential to move during imaging is a bit of a concern, i bought a WO II then never used it as i got me the big 68mm flattener for the 132 which indeed has a 46 or so mm focus (sort of means its no good for dslr) havent tried the .8 II on this yet and possibly never will as its currently got perfect edge to edge focus.
note the 68 is only made for the huge WO focuser
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