how are you getting such a large combined file size, i dont understand that. if you are composing one image not moving the camera, shooting multiple shots at different points of focus, and combining the sharp area in each image into one, arent you at the same original res as one shot?
is there any panorama shifting/stitching going on here, cuz thats the only way for more res. but combine that with focus blending and thats insanely complicated.
also, what is the difference between art and fine art?