I wanted to do my EM-1 a good thing as I her 12-40 2.8 spendiert habe.Seitdem she thanks me offering excellent Photos in the best quality. Had previously Canon full frame 6D with the focal length almost identical 24-70 l 2.8 IS USM. The Canon is twice as expensive, almost twice as heavy and certainly a top it Objektiv.Ob but twice as good is I dare greatly to bezweifeln.Was I therefore want to say. This small part of what is processed still extremely high do you Photos in outstanding quality, as well as in rain and freezing cold. Conclusion: Small, relatively light, and this is my sauscharf Opinion not too expensive. All in all, an objective which the focal length is unparalleled.