As the Canon top-of-the-line flash for the EOS-system, the Speedlite 580EX II takes the best features from existing models and adds functionality that enhances digital photography. A more powerful flash with a maximum guide number of 191'/58 m at ISO 100 (at 105mm focal length), faster recycling, more consistent color and enhanced controls are among the improvements that all photographers, especially those who shoot digital, will find useful.
The 580EX version II offers several improvements over the original 580EX version. It has been redesigned to match with the EOS-1D Mark III in terms of improved dust- and water-resistance, body strength, and the ability to control flash functions and settings from the camera menu (EOS-1D Mark III only). Other features include improved communication reliability through its direct contacts, a metal hot shoe, and recycling time is both 20% shorter than the 580EX and is completely inaudible.
The flash supports all current versions of TTL, including evaluative E-TTL II. This is great for photographers that shoot high contrast or reflective subjects, like those encountered in wedding photography. Photographers can now capture every detail from the black of tuxedos to the white of wide smiles and wedding dresses.
The Quantum Instruments Turbo SC Battery Pack ("S" for Slim and "C" for Compact) provides typical all-day flash shooting capacity like the standard Turbo, yet weighs less than 1 lb and fits easily in a shirt pocket.
State-of-the-art NiMH batteries power the Turbo SC for lightning-fast recycling times and high capacity. Despite its mini proportions, it provides up to 225 full-power flashes with Quantum's Qflash units, or 400 shoe mount flashes, on a single 1.5-hour charge. And, like all Quantum batteries, the Turbo SC features a computerized "fuel gauge" that clearly displays the amount of power remaining and monitors charging progress.
The Quantum CZ connection cable will allow a Turbo series battery pack to power a Canon 430EZ, 480G, 540EZ, 550EX, 580EX, 580EX II, MT-24EX & MR-14EX flash.
Note! To use a Turbo-type battery pack with the Canon 580EX II flash, you will have to disable Flash Custom Function #01 on the flash.