The Sigma EF-140S Electronic Flash for DP2 Digital Camera is the most advanced flash that features TTL flash that provides the perfect flash level output needed to provide the right amount of light. Featuring a compact design, this flash can be easily set on the camera and optimize the TTL flash as a fill flash or as a regular flash. It has a maximum Guide Number of 14 (ISO100 / m) and can be used manually also. It is powered by two AAA batteries and has a recycle time of about 5.5 to 6.5 seconds. This flash is designed for the wide angle camera and is compatible with DP2 Digital Camera.