I recently upgraded to an Arca-Swiss 6x9 F-Classic, partly in order to be able to use shorter lenses.
I already have an APO-Grandagon 55mm with proper Rodenstock center filter (seldom used), and since the general consensus seems to indicate you need the center filter with shorter lenses I am leaning towards the 45mm APO-Grandagon, which requires the same filter.
On the other side, the more expensive 47mm Super Angulon XL has a greater image circle and a longer flangeback distance according to published specs, but will it accept the same center filter?
Moreover I think there is an inconsistency in the Arca-Swiss catalog: in the second to last page you can find a table of required lensboards for the currently available wideangle lenses, and while the flangeback distance of the 45mm is 55.5mm vs. the 59.1mm of the Schneider 47mm XL the latter requires a 7mm recessed lensboard while a flat one should be enough for the APO-G ... can anyone explain why?
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