The Sigma 530ST DG ST E-TTL Shoe Mount Flash is Sigma's economical full-TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. This flash provides full TTL operation with Digital SLR cameras, including full E-TTL II operation with applicable cameras

The Sigma 530ST DG ST i-TTL Shoe Mount Flash is Sigma's economical full-TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. This flash provides full TTL operation with digital SLR cameras, including full i-TTL operation with applicable cameras

The Sigma 530ST DG ST TTL Shoe Mount Flash is Sigma's economical full-TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. This flash provides full TTL operation with digital SLR cameras, including full ADI operation with applicable cameras.

The Sigma 530ST DG ST P-TTL Shoe Mount Flash is Sigma's economical full-TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. This flash provides full TTL operation with digital SLR cameras, including full P-TTL operation with applicable cameras

Guide Number of 61 Auto Zoom Coverage for 24-105mm TTL Operation W/Nikon DSLRs Bounce, Tilt, and Swivel Head Manual Setting Available Takes 4x AA Batteries

The EF-530 Super DG is Sigma's flagship TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. The EF-530 Super DG is also fully compatible with the latest digital SLR cameras that use a pre-flash, and supports full E-TTL II operation (where supported by camera).

The EF-530 Super DG is Sigma's flagship TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. The EF-530 Super DG is also fully compatible with the latest digital SLR cameras that use a pre-flash, and supports full i-TTL operation (where supported by camera).

The EF-530 Super DG is Sigma's flagship TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. The EF-530 Super DG is also fully compatible with the latest digital SLR cameras that use a pre-flash, and supports full TTL operation, including full ADI operation with applicable cameras.

The EF-530 Super DG is Sigma's flagship TTL flash, and has been updated with improved coverage range and a stronger power output. It features a powerful Guide Number of 174'/53 m at 105mm, and covers a focal range from 24mm to 105mm. The EF-530 Super DG is also fully compatible with the latest digital SLR cameras that use a pre-flash, and supports full P-TTL operation (where supported by camera).

The Canon Speedlite 430EX II Flash is Canon's mid-range shoe mount flash, yet it offers many of the same advanced features as its bigger brother, the 580EX II. It is designed to fully support the entire range of Canon digital SLR and G-series cameras.

The Sigma EM-140 DG Ring Flash is ideal for photographing subjects in fine detail - close-up photography - and is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture.

The Sigma EM-140 DG Ring Flash is ideal for photographing subjects in fine detail - close-up photography - and is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture.

The Sigma EM-140 DG Ring Flash is ideal for photographing subjects in fine detail - close-up photography - and is extremely effective for scientific and medical applications. Dual flash tubes can fire simultaneously or separately. Using only one flashtube creates modeling, which can give a three-dimensional feeling to the subject. The Modeling Flash function makes it possible to check for reflections and shadows before actually taking the flash picture.

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.