To view negatives I use this folding glass, which here in the UK is called a linen tester. It doesn’t completely cover a full 35mm frame, but it’s good enough. I used this one throughout my career in the printing industry and was bought sometime the late 60’s.
Linen magnifiers are purchasable from B and H. They're not metal like yours (Does it scratch the film)?
linen magnifier | B&H Photo Video
Shop B&H's in stock, large inventory for fast shipping, great service and everyday low prices on linen magnifier. For more info, please call 800-947-4415
