What's the name of a company that rates/grades lenses?

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KENTGA Veteran Member • Posts: 8,144
What's the name of a company that rates/grades lenses?
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I've seen it in the past but I can't recall it. I am mainly interested in Canon, Sigma and Tamron.

Thanks for the link,

Kent

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Here is a link to some of my travels since 2006. Feel free to comment.
https://www.flickr.com/photos/108062364@N04/albums
KENTGA = Kent from Georgia (metro Atlanta)

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Canon EOS 7D Canon EOS 6D Canon EOS Rebel SL1 Canon EOS 80D Canon EOS 5D Mark IV +15 more
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