Tagged Questions
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What does STM mean on a Canon lens?
The upcoming Canon 40mm f/2.8 has a designation of STM on the lens. What does this mean? What are the advantages of having it and does it replace an older technology?
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What is Canon's Super Spectra Coating?
In the Canon EF 25-105mm f/4 L USM IS lens specs, it says that the lens coating is "Super Spectra Coating". What is the Super Spectra Coating and how it differs from other types of coating?
