T/S Stitch

I like photographing with my Tilt/Shift lenses.  Besides using them for single image photos, I’ll often use them to make stitched images.  I keep the tilt and shift functions in different axis, so that I can tilt to reposition the plane of focus, and still be able to shift left and right.  If my camera is mounted in a horizontal position, the resulting image when stitched in Photoshop is in a panoramic format.  But if I mount the camera vertically, and then shift left and right, the final image is just slightly squarer than 4 x 5 proportions.  Why do this?  Easy answer: file size.  With my D800E, the final 16-bit file is roughly 400 MB.