Quote Originally Posted by Nick Zentena View Post
Shen Hao is selling a new 617 back. It fits 5x7 cameras so I'm assuming it avoids the limitations of the 4x5 version. It's also cheaper. I can't tell from the pictures if it uses a ruby window or not.

Looks very useful. From the picture I'd say pretty definitely that that is a ruby window device. The round item just offset from the middle of the back would be a window with a sliding cover on it: this is very similar to the windows on my Da-Yi 617 back for 4x5.