Canon T4i 18-135mm STM lens Slow Motion Test

http://www.youtube.com/watch?v=dlIoENxu4Bk

How to get the new STM lenses to Full Time Manual Focus

http://www.youtube.com/watch?v=mqalApchRTA

Focus Sound and Speed with 18-135 STM vs Non STM

http://www.youtube.com/watch?v=tm8C76c-jtA

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