Originally posted by kaiserz Nice! I kinda want one or two for my k-7, what else do I need to get an off the camera flash set up?
Technically, nothing else. But that depends on how and where you shoot. In S2 mode, the yn-560ii will ignore the ttl preflash from the camera and fire during the exposure. However, this doesn't work as well outdoors where the bright sunlight can overpower the sensor and not allow it to "see" the pre-flashes. Indoors, there shouldn't be any problem with the optical triggering.
Some cheap radio triggers like Cactus v5 are a reliable way to getting off camera for cheap and not be limited by line of sight and optical sensor luck. You can grab 1 for every flash you have, or get 1 and set all the others to optical slave mode. Then you dont' have to use the on camera flash to trigger any of them.