Would a 300 watt strobe light be stronger than the 580EX flash, and/or the 430 EX flash ?
Find the guide number of the strobe (monolight, a strobe is a specific kind of flash using a separate power pack) and compare it to the guide number of the shoe mount flash, making sure you compare the same coverage. In other words, the guide number of the Canon 580EX is 190 feet *at 105mm*. The monolight will have a guide number somewhere in the area of 150-200 feet, but at 35mm. The monolight is much more powerful than the 580. Any decent monolight will also recycle much faster than a shoe mount flash. The 580EX has a modeling light feature when mounted directly to the camera or attached using the Canon Off Shoe Cord. It strobes the flash very fast, allowing you to see where the shadows are. It also heats the flash up quickly, and drains the batteries. There are many methods of triggering a monolight or strobe wirelessly, from a $30 Ebay trigger to Pocket Wizards at $189 each, optically using another flash, or using a special IR trigger. If your camera does not have a PC socket, you
