michaeldoe

Dear Andrew advanced practical optics ahead of us (with reduced language capability):   With the "speed booster", depth of field will NOT become shallower, compared to the same lens on a normal adaptor.   Today the small sensor is zooming into the lens´ image and therefore detecting softness earlier. With the speed booster, depth of field of the same lens becomes deeper, goes back to the original FF image perception.    Especially because the lens will not "go" from f1.2 to f0.9, it still produces the same optical image.    But of course, with the speed booster we will pick a longer focal length for the same angle and therefore gain much more "shallowness".   Yours,    Michael   P.S. I hope i´m right because this is my first post in here and i don´t want to start with smartass the host and confusing people..