I just bought a new T-piece coupler for my Tak. I had been using the incorrect nose-piece connected to the EP holder before now,
see below.
So here is a full frame of M13 as my first test image.
48min, bias, flats and darks. No guiding 45sec subs.
50% reduced:-
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Cropped 70% :-
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Here are the bits:-
This is the correct configuration, which gives the correct FR distance.
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and this is the old setup:-
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The rings fitted together:-
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The separate pieces:-
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These items were obtained from
Green-witch.CA35 Camera Coupling No 30 - Ref. TAK-TKA35201
Wide T-Mount No 33 - Ref. TMW0004 (not available in Europe, but made up by Green-Witch)
I know that this all looks a bit mundane, but it taken me ages to sort this out without resorting to buying something from the states.