If you’ve been considering purchasing a DSLR camera or you own a DSLR and are considering purchasing a new lens this video is a must watch. It explains the differences between the various image sensor sizes, how they affect the images you take, and what impact they have on aftermarket/upgraded lenses. Ever wonder how wedding and sports photographers manage to get those awesome depth of focus photos? The answer lies within. Even if you’re just the average amateur photographer with no DLSR aspirations it’s an interesting watch.