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MirandaGT
Apprentice
since ‎11-22-2012
‎11-23-2012

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Lens Designations

11-22-2012
What is the significance of the letter designations which appear on Canon lenses:  EF vs EFS   IS vs IS II   USM vs STM      L?Do some of these designations indicate features that are only operational on some Canon cameras but not others?
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