BelOMO 10X Triplet
This is the best 10x loupe for the price, period. I have seen many reviews on this loupe and they all refer to the great quality for the great price.
The lens on this triplet is 21 mm diameter, 19 viewable, which is almost exactly twice the viewable area of a comparable Bausch & Lomb Hastings 10x Triplet. True 3 element achromatic lens provides a bright and crisp view without color distortion. The external housing is metal so it will not break like some other "cheap" hand lenses. Focal distance is 28 mm. Can be disassembled for easy cleaning. For this price, you can't go wrong with this one. Buy two or three, you won't regret it. Comes with or without lanyard.