Thanks, I appreciate the feedback.

If I'm understanding correctly, you take a similar shot view angle on the DSLR with manual settings and ISO corresponding to the film you're using as a proof? That's also what I do, and it works perfectly as long as your film camera's shutter speed and f/stop are accurate (I've been testing all of my combinations lately with a shutter speed tester so I can adjust if necessary). I always shot 4x5 using a spot meter for zone measurement and placement, but I think it's been nearly ten years since I shot any 4x5 at all. It's something I'm looking to get back into, but I no longer have a home darkroom. I do a lot of digital post processing, and I drool at the thought of a 100MP plus image to work with.

The type of digital back that I've been talking about mounts the DSLR body (without lens) on the film plane for final images, which are then stitched together in PP, resulting in a much larger image to work with. The distance added to the lens to image plane distance and the long focal length lenses required are what make this a challenging process.

Best,

Andy