Canon Flash Issues
I own two Canon 580 EXII flash units and I have found them both to be frustratingly unreliable. One had to be returned to Canon after six months for a burned out lamp. On both the connection at the hot shoe is annoyingly finicky and I've lost some good shots because of it. Two friends with Nikon equipment report no problems at all. I wish there were a reliable alternative.
Sony a6000 w/24mm 1.8, Canon 7D ll w/400mm 5.6, Canon 7D w/100mm macro, Canon 580 EX ll and 600-Rt Flash, Panasonic Lumix LF1