I've just chanced upon what looks like an older (and much cheaper) version of th e Arca Swiss 6X9 FC: the SL23 A. Has anybody heard/owned/tried it? Apart from th e fact that it is probably less compact that the 6X9 FC, what would be the main differences? Could I use a 47 mm without having to change the bellows? Are there any limitations for use in architecture/landscape photography?

thanks a lot

Christophe