Quote Originally Posted by dcloud View Post
May i ask if the bmcc sb is better than regular sb in wide open? Or are they the same?
I'm not sure what you mean by regular? Do you mean the 0.71x Speedbooster? If so, I don't own one so can't make any comparison.

I do have a Zhongyi Turbo II EF-MFT 0.71x which works very well, especially since all my lenses with EF mount (apart from two native Canon EF) are vintage and manual.