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Hi Mick
I purchased a unit for my Pentax *ist DS. I have only used it a few times and it appeared to work as described. Later on, I began to notice that even in the viewfinder, the stars were not focused after focusing with the Stiletto. I inspected my set up and discovered some slop in the 3rd party Pentax K adapter (not from Stiletto). After replacing it with a new one from a camera store, everything returned to normal and the stars were back in focus.
It is worth noting that I have only used in on F9 and F10 OTA’s, where there is a larger focus tolerance compared to say F6 systems.
It is an expensive unit and I only purchased it as I was having difficulty getting reliable focus with the Pentax and it was way too tedious to try software assisted focus as DSLR focus does not support the Pentax.
Cheers
Dennis
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