I have a 4x5 camera I haven't used since Polaroid 55 disappeared. I'm wondering if there is an easy and/or inexpensive conversion to produce digital images using the 4x5.
Depending on your quality requirements and your DIY tolerance, you can use a flatbed scanner without glass mounting, flatbed scanner with glass mounting, shoot your negs with a digital camera, buy an Imacon/Hassy scanner, or send out negs for drum scans, if you can find a reliable scanner operator.
Check this out: http://www.filmtoaster.photography/
You could probably build something similar for next to nothing if you are handy and don't value your time highly.
Oh, rats. I see I got it backwards. You don't want to scan your negs. You want to turn you 4x5 into a digital camera.
I have a Betterlight Super ^K scanner that slides into the back of a 4x5 camera like a film holder. It takes 30 seconds to several minutes to scan a 72x96 cm area, and thus is only good for thing that don't move.
I don't think you can buy them new any more -- not that you'd want to pay the freight -- but I'll bet you can find used ones. They are a pain in the posterior in the field, and need to be tethered to a computer.