Don't optimize your purchase, optimize your technique

The Visual Science Lab: Don’t optimize your purchase, optimize your technique:

Here’s the secret that drives lens junkies crazy: All good lenses are great two stops down from wide open. Almost without exception. Take a 14-24 Nikon and compare it to an Sigma 10-20mm lens and at f5.6 or f8 you’ll probably be amazed to find that they are pretty darn close.