If you use a professional digital camera, you can't go far without understanding the relationship between sensors, lenses and depth of field. It's slightly more complicated than you might have thought!. Phil Rhodes makes it understandable
One day — soon — it may be possible to take almost perfect photos and videos with less-than-perfect lenses
It’s fast but it’s also a zoom lens! For a long time now, zoom lenses have been firmly in the world of compromise. They are practical in terms of saving lots of time on low budget productions but that advantage comes at a cost.
Last time, we discussed some of the technical concerns of lens selection and the issues of compatibility with sensors of various configurations and sizes. In this part, we'll look at the effects sensor size has on photography and the engineering compromises behind lenses and sensors