Hi,I received a Vivitar Zoom Thyristor 2500 flash unit and am looking for a resource to help determine if it is compatible with my Canon 5dsr, Rebel XSi or SX50 HS. Thanks for any assistance. Rich
Hi ebiggs1,I bought an SX50 and the seller threw it in. I don't know much about flashes and took this opportunity to cement my opinion that the seller should be emulated.
