An illuminating device is used for oral photography and is connectable to a lens barrel provided on a camera. The illuminating device includes a light-emitting surface that has an arc shape, so that a periphery of a mouth being under a nose of a person being photographed can be exclusively illuminated.

 
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< Method of distance estimation to be implemented using a digital camera

> Automatic focusing apparatus

> Water/drip-proof structure for acoustic member and electronic apparatus having the same

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