Double-takes Ben Brain shows you how to get creative with your images by merging shots  in-camera Back in the days before digital, making a multiple exposure was a creatively rewarding, if fiddly, process. The technique involved disengaging a camera s film advance and then re-cocking the shutter so that two pictures could be taken on top of one another. Not only was this a tricky process, but you also needed to make additional exposure calculations to ensure the merged images weren t either over- or under-exposed. All in all, despite the potentially interesting and creative results, it was a bit of a bore, and you d also have to wait until your films came back from the processing lab before you knew whether you d nailed a winner or not. Recreate the effect Surprisingly, many current digital SLRs are capable of shooting multiple exposures (although most Canon SLRs can t). You ll find this intriguing feature hidden away in the shooting menu, and here we ll show you how to use it. In-camera techniques like this are often fun and creatively challenging, but if you re using a SLR that doesn t have this feature, you can replicate the effect in Photoshop. How to... SHOOT DIGITAL MULTIPLE EXPOSURES Add a new  double shot  technique to your creative repertoire Get set up If your SLR has a multiple exposure feature, navigate to it and designate the number of shots you want to layer together. Some cameras have an Auto Gain option, which will adjust the exposure of each shot so the merged end result is correctly exposed. Choose your subjects The charm of this technique lies in the element of chance, as it s hard to fully visualise the results. Here, we ve combined a portrait with tree textures. It s good to have a rough idea of where the key elements of your composition are in each of the shots. Edit your shots This is an in-camera technique, but there s still work to be done later to eke out detail, boost tones and enhance colours. Shoot in raw and use Adobe Camera Raw to recover detail in the highlights and shadows. A boost to contrast will intensify the effect.

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