So I got a cheap lens (Phoenix 19-35mm f/3.5-5.6) at a thrift store, and also picked up a Tamron 24-80mm f/something (don't recall right now) Was going to keep only one, but would like to do a ...

Wondering whether to spend the extra bucks for that premium lens? Test measurements from DxO Labs try to make it easier to gauge its sharpness on different camera bodies. Stephen Shankland worked at ...

Central sharpness is outstanding at f/4 and f/5.6, excellent from f/8 to f/16 and very good at f/22. The edges are excellent from f/4 to f/8, very good at f/11 and f/16 and fair at f/22. That is a ...

As you might expect, you use Aperture-priority mode when you need to control the size of the opening through which light travels to reach the sensor -- usually to affect the depth of field -- but ...