Okay, we've all seen `em, some of us got `em: dots on the lenses.
How is a red dot or gold dot or blue dot or yellow dot different from another dot or no dot at all? Is there a standard code where a particular color means a particular thing, or is it different from manufacturer to manufacturer or even lens model to lens model?
And while we're at it, how does a gold-rim dagor differ from just another plain-old-dagor?
Probably common knowledge, but I've never heard...
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