I shoot with the Shen-Hao 6x17 back on my Sinar F2 (for horizontals, the back cannot be mounted vertically on the Sinar) and on my Horseman (for verticals, the back cannot be mounted horizontally on the Horseman). I’ve been shooting a lot of interiors as of late with my 90mm Sironar f4.5 and with my Schneider 72mm Super Angulon XL f5.6 with a center filter. I love these combinations with this back however be careful as if you are focusing too far away (such as infinity) with the 72mm Super Angulon XL. The rear element (which is huge on the 72mm Super Angulon XL) can make contact with the 6x17 back. I really have enjoyed this 6x17 back but will eventually step up to a 5x7 camera with a 6x17 back made for 5x7, only because movements are restricted by a 6x17 back on a 4x5 platform.