Thank you so much again to all contributors!
Now my ideas are clearer... The main important topic is the "quality" of the lens in terms of sharpness and whatever we like for wished results.
Other suggestion helpful for me is that from Gary:
My Schneider 80mm f/4.5 Super-Symmar XL on a Linhof recessed board fits inside the Master Technika without caps or center filter.
A true wde-angle according to my specs Now I've to chase for it!
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