"Join us on Thursday, July 23 at 3PM ET (12 noon PT) for a Live Q&A with our experts about the new SIGMA 100-400mm DG DN OS Contemporary lens, available now for Sony E-Mount and L-Mount cameras.
This live discussion will feature SIGMA Ambassador Anabel DFlux (music, pets, portraits), SIGMA Ambassador Jim Koepnick (photojournalism, commerical, sports) and our own tech rep Aaron Norberg to handle the tough technical queries. Join the stream and ask your questions!
https://www.facebook.com/SigmaCorporationofAmerica/live/ "
