Hi, i have a question about some sunglass which having a Filter Category, is anyone can explain here how to categorize it? base on what standard?
thank you..
:cheers:
Hi, i have a question about some sunglass which having a Filter Category, is anyone can explain here how to categorize it? base on what standard?
thank you..
:cheers:
In many standards, including ANSI Z80.3 and ISO 8980-3, the "category" of a sunlens is defined by its luminous transmittance. You will need to determine the standard in question first, since the specific requirements and definitions of these categories often vary.
Darryl J. Meister, ABOM
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