Therefore, there is no possibility of shifts, plus you have to use an awkward front standard configuration, plus the tilts are limited to the back. When using longer lenses, ther problem is that since the extension is a cone joining the 5x7 back to a 5x5 square, to avoid vignetting by the internal elements of the camera, the lens has to lie inside the cone. This is not a problem for the large border , but definitely one for the small one. A 300mm on the 5x7 is the equivalent of a 60mm for a 35mm camera, thus this is pretty short. With tilts, you have to be quite careful to avoid vignetting.
Shifts are also extremely problematic.
The 8x10 double is also good value.