While it won’t help if your subject is moving around quickly, don’t forget to use your camera’s anti-shake system. While some camera systems have this built-in around the sensor, of camera systems prefer to have the system in the lens – the benefit being that you can see the effect in the viewfinder.
Not every lens will feature this technology though, but if you have it – use it. You’ll be able to shoot handheld at much lower shutter speeds than you would otherwise normally be able to do and still come away with pin-sharp shots.
4. Increase your ISO
People move around a lot as they’re photographed, not to mention blink and constantly change their facial expressions – and there’s nothing worse than a photo of somebody half-blinking or gurning instead of smiling!
To avoid these problems, and to prevent motion blur appearing, you’ll need to use a fast shutter speed.
This will also help to ensure sharp shots and avoid camera-shake because more often than not you’ll be shooting portraits handheld.
While in Aperture Priority mode and maintaining a wide aperture, to increase your shutter speed simply increase your ISO (from ISO100 to ISO400, say).
In low light (indoors and outside), you may need to increase it to ISO1,600, 3,200 or even 6,400. A little grain is infinitely better than a blurry, useless photo.