Canon ESO Speedlite 550EX Flash w/ Case

This is a workhorse of a flash! It served me well but I switched to Sony so it need to go to make room for other gear. Canon description: The Speedlite 550EX is a profesional grade flash for Canon EOS cameras. It's a powerful and sophisticated flash that offers many refinements and improvements over Canon's previous top of the line 540EZ flash. Unlike it's predecessor, the 550EX is compatible with digital EOS cameras and film EOS cameras. Because it's capable of producing pre-exposure test flashes, the 550EX is compatible with EOS bodies that employ the first generation E-TTL camera flash system introduced in 1998 and also with EOS bodies using the newer improved E-TTL II metering system introduced in 2005. Compatible with all Canon EOS cameras, digital or film Strong 180 Guide Number (ISO 100 in ft) Head tilts upwards and swivels side to side for maximum bounce flexibility Informative display screen with backlight Segmented distance scale allows estimation of output needed versus recycle time External battery pack connection Autofocus assit beam helps AF in low lighting Dedicated switch for setting Master or Slave Wireless modes Supports Flash Exposure Compensation & Flash Exposure Bracketing in 1/2 and 1/3 stop increments Stroboscopic mode Supports High Speed FP Sync, Rear Curtain Sync, and FEL (Flash Exposure Lock)