When I first started, I used loupe and an iPad app designed for dentists to use to view their X-ray negs. At $.99, it was a bargain. Now I have a plate of opaque (white) glass that I had cut at the hardware store. Sealed the edges with electrician's tape so I wouldn't kill myself, and I swap out the safe light glass and use it as a light box. Again, at less than $6, a bargain.
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