Do you sometimes feel that you can’t get photos at the right moment. Finger probably trigger the camera too late or to soon leaving you with meaningless image. So why not to leave this job for electronics. Arduino is suitable to do the job.
There are two tasks for arduino to do – one is to control camera trigger and another to sense right moment when to trigger. Trigerring can be very simple – just use right circuit connected to camera electronics.
Another task require more imagination on how to detect right moment. Solutions may be sound and light. Use simple light sensor made of cheap laser pointer directed to photoresistor and let arduino trigger camera when laser beam is broken by obstacle.
Using sound sensor is more interesting as it allows to photograph splashing water drops or anything that makes noise. Using simple techniques you can get really professional photos with simple camera.