Any 5x7" field camera with a graflock back?

Sal Santamaura said:

My Ebony SV57 has locking sliders on the back.

Click to expand...

That sounds like the best, sound solution considering how rare and expensive these backs could be, or, you can firmly mount your 5" x 7" to a circular rail system and just rotate the camera as a whole, 90° to the left, right and back to center.

IMO.