Depending on your useage I reckon a custom one is the go. Variable spacer to work out the exact length and a custom one to suit later.
Paul’s use in EAA where he wants detail in the main area and wants it quickly would potentially be slightly more forgiving of any tilt issues than what I would do with a RASA where I would be pushing exposure times as long as feasible and wanting nice stars right to the corners for a heap of subs to integrate. Not sure what your plans are?
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