does anyone have experience with the Sigma EF 500 DG Super or the Vivitar DF340-N?
#1. "RE: Vivitar or Sigma i-TTL flash" | In response to Reply # 0cdplatt Nikonian since 14th Aug 2004Mon 20-Oct-08 12:04 AM
I have experience with the Sigma EF 500 DG Super. Works great. You just have to be careful about which Nikon model you plan to use it with to ensure it is compatible. Don't expect the Sigma to be upward compatible when new cameras are introduced. I've purchased a couple of Sigma flashes, but I stick with the Nikon Speedlights now.