Another important aspect of portraiture is sharpness. Even if I get my composition and lighting correct, the determining factor of a usable photo (during a photoshoot) is sharpness. Fortunately, my 24-70mm lens has never let me down in terms of sharpness.
Some may argue that a prime lens like a 50mm f/1.4 or 50mm f/1.8 would be better, but I disagree. Shooting with a prime wide open and in an outdoor environment, you’ll definitely see some ghosting, or even chromatic aberration. Decreasing the aperture may address this, but this may affect your lighting and amount of bokeh. With a 24-70mm f/2.8 lens, I get sharp pictures even when I shoot wide open.
Here are some images to drive my points across: facebook.com/Hibikipro Hibikipro.com facebook.com/yoshi1127 yoshi1127.com
Being versatile, the 24-70mm lets you take close ups as well!
As you can see, the amount of bokeh from a 24-70mm is just nice – not too much and not too subtle.