Bokeh comes from the Japanese word boke (ボケ), which means ‘blur’ or ‘haze’—or boke-aji, the ‘blur quality.’ Bokeh is pronounced BOH-Kə or BOH-kay.
Visit any photography website or forum and you’ll find plenty of debate on the pleasing bokeh that user’s favourite fast lenses allow. The adjectives flow thick and fast: smooth, incredible, superb, good, beautiful, sweet, silky, excellent …but what exactly is bokeh?
Bokeh can be defined as ‘the effect of a soft out-of-focus background that you get when shooting a subject using a fast lens at the widest aperture.’ Simply put, bokeh is the pleasing or aesthetic quality of out-of-focus blur in a photograph.
Although bokeh is actually a characteristic of a photograph, the lens used determines the shape and size of the visible bokeh. Usually seen more in highlights, bokeh is affected by the shape of the diaphragm blades (the aperture) of the lens. A lens with more circular-shaped blades will have rounder, softer orbs of out-of-focus highlight. A lens with an aperture that is more hexagonal in shape will recreate that shape in the highlights it captures.
© Jody Dole, Bokeh is easily seen in the foreground and background.
ACHIEVING BOKEH IN YOUR IMAGES
To achieve bokeh in an image, you need to use a fast lens—the faster the better. You’ll want to use a lens with at least an f/2.8 aperture, with faster apertures of f/2, f/1.8, or f/1.4 being ideal. Many photographers like to use fast prime lenses when shooting photographs that they want visible bokeh in.
You’ll want to shoot with the lens wide open, so it’s best to use Aperture Priority or Manual shooting modes. Manual gives you the ability to choose both your aperture and shutter speed. Aperture Priority allows you to choose the f/stop (aperture) while the camera chooses the appropriate shutter speed for the exposure. You could also use the Flexible Program mode, which will let you choose the widest possible aperture/shutter speed combination.
Don’t worry if you don’t own a very fast lens. By increasing the distance between the background and your subject, you can see bokeh in images that are shot at smaller apertures.
To increase the likelihood of visible bokeh in your photographs, increase the distance between your subject and the background. You can do this by decreasing the distance between the camera and subject. The more shallow the depth of field, or the further away the background is, the more out of focus it will be. Highlights hitting the background will show more visible bokeh too. If you’re using a backlight, side light, or hair light, the bokeh may be more pleasing to the eye.
Portraits are excellent for bokeh. Close-up portraits in particular show bokeh very well. Close-up and macro images of flowers and other objects in nature are also popular subjects for showing bokeh. And a grouping of holiday lights or other highly reflective objects, purposely photographed out of focus, become diffused orbs of glowing light.
Bokeh can add softness to an otherwise brightly lit photograph. Using this technique to separate your subject from the background can also allow you to utilise a not-so-photogenic backdrop. Because of its diffused blur, it helps to highlight the subject instead of detracting from it.