You are almost there, just a click away from adding your Canon lens to the cart but WAIT! What happened? Why are you stepping back? Did you see those abbreviations ( STM, USM, EF, L, zoom , etc) and got afraid as you're unaware? Many of us have these questions, "What do they mean?", "What exactly are they for?", "Are they really important?" Well today I am going to break it down for you and make you understand each and every abbreviation related to your Canon lenses so that at the end of the day you make a better and a smarter purchase. Fig 1: The types of abbreviations Mount Type The mount type decides the compatibility of the lens with the DSLR. The DSLRs have their own mount types which should match the one on the lenses, this assures secured and accurate means of connecting the lens to the camera body. Moreover, it enables an electronic communication between the lens and the DSLR to achieve precise focus and...
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