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This picture of three Humpback Calves is a composite of three shots of the same calf taken on 22nd September 2012 with my Nikon D7000 digital SLR while snorkelling in Rurutu, French Polynesia.

I used a Tokina 10-17mm lens on Shutter Priority. Natural light. ISO 400, shutter speed 1/160th, aperture F8, focal length 12mm. No exposure compensation.