Just go into photofocus and flip the pages its surprising how fast you get into the right state for photoreading.
Your mind will aways provide the right brainwave pattern - just follow the steps.
The more you worry about getting in the right state the less you are going to be there. The right state is free from worries and just plain doing. Once you just start doing you happen to fall into something like the flow state. There the mind is doing what it has to do. Consciously you only need to be aware of the steps.
Alex