Right off the top, in my opinion, Speed Booster has better optical qualities.
I’ve come to this conclusion by attempting to compare the amount of image degradation that takes place, when the reducers are applied. In the next two shots, we can see a comparison between SB and a regular adapter:
The first thing I noticed in the above images, is the increased subject isolation (or reduced DOF) with Speed Booster. The subject-to-camera distance was 36 inches. A quick look at the ...Continue Reading →