comments:
BornEvent1674 posted on r/machinists3d
Not sure how I ended up here but I went to school for Geology and we have similar uses for them. I have a Belomo triplet loupe like this and would recommend it. https://belomostore.com/belomo-10x-triplet-loupe.html Nikon and some other manufacturers make good ones too, this would be my choice if I had to buy another one right now (because it's a trustworthy brand and readily available) https://a.co/d/0cYIjfRM