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A Primer On Phase Detection Autofocus VS. Contrast Detection
Kishore Sawh
Autofocus systems are intricate and very technical, but if you ever wanted to gather usable information as to which means what, here it is.
An Inexpensive Way to Calibrate Focus on Your DSLR For Sharper Images | AF Fine Tune
Hanssie
Focus calibration doesn't have to be expensive or difficult, try this method out and see if you can save yourself some time and money.
Phase Detect AF: How Accurate is it Really?
fotosiamo
Roger Cicala from LensRentals.com’s Blog recently came out with a two part article testing the accuracy of Phase Detect AF. ...
