I'm not sure the product you linked in your post will be suitable for travels in Europe, as the specifications state "125 VAC, 60 Hz". For travels in Europe, the product that Mike linked is a more suitable choice.
As stated in the product information, this is not a voltage converter. The chargers for your iPhone and iPad will work fine on European voltages. However you didn't specify what type of camera you're using, so you'll have to check the nameplate data on your camera charger to ensure that it's also designed to work from 100-240 VAC. Look for a small label on the charger, and specifically the words "Input Voltage". If the camera is fairly recent, it's likely it will be configured for multiple voltages.
One other point to note is that although the Unidapt is equipped with three North American style grounded outlets, any products connected will NOT be grounded, as the supplied plug is not provided with a grounding pin. For the chargers mentioned, this shouldn't be a problem.