Canon officially launches the RF 28-70mm f/2.8 IS STM
I mean even in EF days the Ls came in different levels. The 17-40 and 24-105 were much less highly rated than most of the others. Can't say I've ever knowingly encountered silver or gold rings.In the old days of the EF/EF-s mount things were much more clearer.
We had the Red ring for all L lenses and they were the best that Canon could make (and they were generally about 10-15 years ahead of the competition in terms of design, build and optics).
Then we had the Gold ring for the next best prosumer gear. Higher on the optics but lower on the build level. Often not quite as bright as the L lenses.
Then came the Silver ring for pretty much everything else. Generally, cheap, small, light, dim and disposable.
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