I have two APS-C (70D and 600D) bodies with Canon EF and EF-s lenses, and Sigmas, among them the Sigma 70-200 f2.8 HSM OS. I am also considering getting the new Tamron 150-600 lens, pending reviews. ...
I just got a Phoenix DZBIS-112CII external flash for my Canon 550D. I have tried everything that I can think of to make it fire, without any luck. It came with four dead batteries in it which had ...