Ah, I see. If I had a GG like in that picture on the top, I'd be ok and could shoot S16 and crop the sides without having problems with the optical axis, right? http://i.imgur.com/xArDAfE.png?1
I would then need to crop the sides in post to get the 2,66:1 ratio with the anamorphics. The N16 ground glass (+adjustment) does not give me more resolution/information than the version I just described, correct? When I'd find such a groundglass with 1.33/1.37 markings I wouldn't have to change the PL mount to N16/S16 position ever again?
Thanks.