All the external flash designed for the electrical connection to the camera, are divided into two categories: high and low voltage at the connector for sync. The first of these can only be used in conjunction with cameras with mechanical sync, the second - with any devices. Never neglect this rule, otherwise an expensive camera fails. If you need to connect the outbreak of the first type to the machine with electronic sync, you will have to buy or make a special matching device that's placed between your camera and flash.
Take special care when using the flares, fed directly from the mains. The chain run in this illuminator must be separated from circuits under AC voltage, megamini resistors on both sides (not just one).
Some flashes are worn directly on the connector located on the unit (called wireless), and the other connected cable. Remember that the wireless flash only increase the brightness, but not resolve the main problem - the location of the shadow behind the object. If desired, wireless flash can be transformed into another by adding to it the cable. It needs to be well insulated.
Very comfortable photoflash equipped with a light sensor. They are included simultaneously with the triggering of small flash located directly at the camera. With the very device they are connected only optically, and therefore do not threaten him damage even in case of failure. If desired, you can turn into a flash and standard, adding to it self-made or ready-made device - sitoinglese.
Place the additional flash to the side of the camera - the only way you will get natural looking shadows in the image. With a few siteinformation can be made to work simultaneously with multiple camera flashes, thereby obtaining an even more interesting artistic effect.