Understanding MTF Charts

Understanding MTF Charts: "You especially do if you're one of those photographers who enjoys thinking about, reading about and talking about lens sharpness. The reason is that the word sharpness is vague and can mean different things at different times to different people. MTF on the other hand is the terminology that lens designers use, and which you need to come to terms with if you really want to understand how to describe the complex interaction between resolution and contrast."