Canon Speedlite 580EX

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Combining the strengths of its predecessor 550EX while providing additional functions at higher speeds,
the SPEEDLITE 580EX is Canon’s new flagship flash unit featuring a higher maximum guide number,
shorter recycle time, autozoom control for image sensor size, and design improvements for easier handling
by digital SLR users ranging from professional to advanced amateur.

The new Canon Speedlite 580EX is that latest in Canon's evolution of high end, shoe mount, speedites. From the 430EZ to the 540EZ, 550EX and now the 580EX, power output and features have increased.

The new 580EX is, of course, E-TTL (and E-TTL II) compatible, and it has a guide number of 58/191 (meters/feet) at ISO 100 and 105mm focal length. It's both smaller and lighter than the 550EX which it replaces.

One major new feature for digital shooters is that the flash now knows the sensor size of the EOS 20D (and EOS 1D Mk II with firmware update), and zooms the flash head to give full coverage over only the area seen by the sensor. The 550EX did not do this, and so, for example, "wasted" energy illuminating the 24x36mm frame outside that covered by the 22x15mm sensor in the 220D.

The 580EX also communicates with the 20D and 1D Mark II to ensure better white balance. If the battery charge starts to run low, white balance is adjusted to compensate for changes in flash characteristics.

The wide angle diffuser on the 580EX now gives full flash coverage for 14mm lenses (full frame), which means that it will provide full coverage for the EF-S 10-22 lens on a 20D or 300D (equivalent to a 16mm lens on full frame).

Features of  Canon Speedlite 580EX

Increased Maximum Guide Number
With a maximum guide number of 58 (105mm, ISO 100 in meters), SPEEDLITE 580EX improves on the 550EX maximum of 55 to optimize flash output and power. The improved design of the flash head is another reason for increased flash output.

Styling and Functionality to match the latest line of digital SLRs
Reducing width by 4mm and weight by 30g, the SPEEDLITE 580EX matches sophistication with handling ease. The flash head’s built-in wide panel expands flash coverage to suit wide-angle shots of 14mm angle of view. A catchlight panel generates a weakened light toward the subject for lively portraits when extended and the wide panel retracted.

Stress-free function selection through redesigned dial
The newly adopted Select dial simplifies the main operation interface from holding down the + or – button to turning the dial. Among other advantages, the new layout adds a high-speed synch button, centers the SEL/SET button, and relocates wireless functions to the zoom button.

Peripherials and for empowerment in flash needs
With eight AA batteries, the new external power pack Compact Battery Pack CP-E3 not only makes replacement easier but also increases the number of flashes by *20% while shortening recycle time by *25%. A battery magazine is provided for easier and quicker battery change. The L-bracket Speedlite Bracket SB-E1 is designed for canceling unnatural shadows that can appear during vertical shots. It is particularly recommended for professional press photographers.
* In comparison with CP-E2. Based on Canon's testing standards.

Shorter recycle time for capturing best shutter chance
Thanks to modifications to the battery contacts and recharging circuit, the recycle time of the SPEEDLITE 580EX has been made *25% shorter than available with the 550EX.
* With new LR6 batteries x 4. Based on Canon's testing standards.

Functional advantages especially designed for digital SLRs
When the SPEEDLITE 580EX receives image size data from a supported EOS digital camera*, the flash head automatically zooms to match the effective angle of view. The resulting flash coverage is more accurate. When color temperature data is automatically transmitted from the SPEEDLITE 580EX to a camera*, the camera sets the color balance for the optimal flash shot.
* EOS 20D, EOS-1D Mark II (firmware update necessary) or later camera models

Retained and upgraded functions for greater versatility
Flash exposure control system, wireless flash control with multiple Speedlites, and even distribution of light over the zoom range are retained. One new function is the expanded range of the AF-assist beam, compatible with all EOS AF cameras, including the EOS 20D. Left-right 180° bounce, one-touch bounce lock release, and improved controllability for greater exposure stability are among the upgraded functions.

Supplied Accessories with Canon Speedlite 580EX

• Carry case