Digital Camera World

Have fun with bokeh

Take advantage of festive lights to enhance the mood of your close-ups

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Approachin­g a small-scale setup in the same way that you would a portrait shoot is often a good rule of thumb. Consider using a longer focal length (something equivalent to around 85-100mm) to isolate the subject against a complement­ary background, and setting a larger aperture to reduce the depth of field. You can then selectivel­y focus on the part of the subject that you want to be sharp, with the rest of the scene being rendered as a soft blur.

The further the backdrop is from the subject, the more pronounced the blur. You can also position something very close to the lens to create blur in front of the subject, which can add a sense of depth to the image.

String lights are a useful accessory to use for this technique, as the out-of-focus highlights can add a pleasing ‘bokeh’ to the background. The bokeh – or blur quality – will depend on the lens that you’re using. Typically, if it’s a fast lens (one that has a large maximum aperture for its focal length – such as an 85mm f/1.4 or 100mm f/2.8), the lights will be rendered as large, soft discs when the aperture is used wide-open. The longer the focal length, the greater the size of the discs in the image.

Set your camera up on a tripod in a dark room, and set a manual exposure so the background lights are exposed correctly. The subject will be too dark, so illuminate it using an off-camera flashgun or a torch.

 ?? ?? … but using f/2.8 gives more pleasing blur. Note the ‘cat’s eye’ shape of the highlights at the edge – some lenses suffer from this more than others.
… but using f/2.8 gives more pleasing blur. Note the ‘cat’s eye’ shape of the highlights at the edge – some lenses suffer from this more than others.
 ?? ?? The 15cm subject was placed one metre from LED light strings draped over black velvet fabric. The light discs look OK with the aperture set to f/5.6…
The 15cm subject was placed one metre from LED light strings draped over black velvet fabric. The light discs look OK with the aperture set to f/5.6…
 ?? ?? Holding lights close to the lens adds foreground blur. Be prepared to adjust the exposure when you do this, to make sure the image doesn’t get too dark.
Holding lights close to the lens adds foreground blur. Be prepared to adjust the exposure when you do this, to make sure the image doesn’t get too dark.

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