The 'standard' magnification for a loupe (for jewellery & gemstones, stamps & coins) is 10X.
This one is marked "30X21" The image is unusually sharp for a 30X. That's because it's not really 30X.
The diameter of the lens is 21mm.
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As you see, clearly marked 30X21. True, the lens is 21mm diameter but there is no way this is 30X magnification, it is 10X magnification.
To help you compare loupes, a summary of this item is shown in blue:
10X12 - 10X13 - 10X14 - 10X20 - 10X21 - 10X21 - 10X23 - "30X21”
(magnification X diameter of lens, mm)
BASIC - good - very good – exceptional
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This is the one you see at every antiques fair and street market, with the sellers confidently telling their customers it's 30X magnification.
There is no way this is 30X magnification, it's 10X magnification.
So how do I know? that this is 10X and not 30X?
Firstly, I'm an expert, I can see it's not 30X.
Thirdly, I import these from the manufacturers (they come in packs of 480) - the last time I ordered this model in 10X they said (I paraphrase): we can't supply "10X" at the moment because our machines are set up to print '30X' on them.
We do have a high quality 30X loupe, but it costs over £30.00.
Everything you need to know about magnifiers and magnification.
See information about (and reviews of) loupes (small high-power folding jewellers' magnifiers).
Video (electronic) magnifiers, video magnifiers compared.
Products: see pocket microscopes and phone microscopes, click here.
With most magnifiers* magnification and working distance are related. Download our Excel sheet, enter a magnification to see the resulting working distance, enter a working distance to see the resulting magnification.
* excluding surgeons-type, digital & phone magnifiers, and microscopes.
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