After a brief test, I realized that I do not need that part. Even with Canon flash workshop is not recommended, what I did not want to admit.
After a few sample photos I quickly realized that it simply creates a shift in the histogram. But do not scatter, but just another way that I am also a tremendous reach with a +/- Aperture. From a softer illumination I could not really tell the difference.
The diffuser is superfluous for me, possibly there are other diffuser are better. This does not, however, sufficient for my needs.
From the processing, he's fine, it can be set up easily on the flash, therefore 2 points. Right know the material is not well, probably resulting in a temperature shift.
