Photozone: http://www.photozone.de/canon_eos_ff/89 ... 00f4556is2
PB: http://www.photographyblog.com/reviews/ ... sm_review/
Ephotozine: http://www.ephotozine.com/article/canon ... view-26892
DigitalRev: https://www.youtube.com/watch?v=onqanHeXqlA
Roger Cicala (rozoberanie): http://www.lensrentals.com/blog/2015/02 ... -lens-ever