Alternatively - Find an old, cheap, SLR film camera at a 'Thrift' / Charity shop - an old Pentax / Olympus / Minolta - Take the standard lens off - and use that, reversed - the optics will be infinitely superior, & sharper than any loupe.
I use an old Nikon 50mm 1.4 - ( I was an Advertising Photographer for 25 years )
You can use the discarded camera body, as an ashtray / door stop / Something to throw at a noisy neighbour
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