First impression was that the main image was little bit to small maybe try filling the screen a bit more which would show less of the background that others are talking about.
Camera icon mainly stood out for me, maybe a bit to big but if Im honest it does work as it is.
You have the main image in the middle with the other images faded to the right, when you click further into the images on the right would images then appear to the left.
Overall I like the design, its simple and clean looking. Icons are clearly viable but no obstructive.