Nikon vs B&L Magnifiers

Hi

I would go with a fixed power model with better optical correction, such as the Hastings Triplet, [url=http://www.opticsplanet.com/bausch-lomb-brand.html]Bausch & Lomb[/url] Hastings Triplet Loupes [url=http://www.opticsplanet.com/magnifiers.html]Magnifiers[/url], if you need more magnification, rather than standard, multiple lens models. Color correction on standard models is not up to the task of serious examination of jewelry.

What do you think of the [url=http://www.opticsplanet.com/nikon-brand.html]Nikon[/url] or B&L pocket [url=http://www.opticsplanet.com/magnifiers.html]magnifiers[/url] that are not true
jewelers loupes, but have 3 separate flip-out lenses that if combined can give multiple permutations of magnifying power? Are they high enough quality to use for pretty frequent examination of jewelry/semi-precious stones?