Explanation of when to expect to take pictures, how to shoot ghosts, and what Auxiliary Functions, Shutterbug Moments and Power-ups are.
When to look for a ghost in Finder mode:
In Finder mode, you can see things that can't be seen with a naked eye. If you feel the controller vibrate or hear strange noises, a ghost is most likely around. Enter Finder mode, search around until the filament glows and take a picture.
Shooting Ghosts:
Hold up the camera with the O (Circle) button, and press the shutter with the X button to attack ghosts. When the target is inside the circle, power (Mystical Power) accumulates. The damage you inflict on the ghost goes up as you accumulate more power in the camera.
Shutterbug Moment:
While you have the ghost in your viewfinder, and the circle glows, take a shot. You can inflict heavy damage when you take a shot during Shutterbug Moment.
About Power-ups:
You can acquire Mystical Power by damaging ghosts. Select "Camera" from the Menu Screen, (▲ - Triangle button) to access the Power-up Screen. You can unlock the seal on the camera with the accumulated Mystical Power, and power up.
About Auxiliary Functions: When you unlock Auxiliary Functions Seal, you enable many special attacks. To use the enabled Auxiliary Function, press the L1 button while in a shooting stance. The number of auxiliary functions you can use is limited to the number of spirit stones in your inventory, so be frugal.