My girlfriend's birthday is coming up. I know nothing about cameras, but I'd like to surprise her with what I believe is called a Ringlight for her camera. It is definitively a Canon camera. Are there standard sizes for that brand? I don't have the camera itself, it's at her house, but could take a picture or two of some battery attachments and accessories for it. She is a very serious photographer and I would like a proper, professional Ringlight as well.
I'm looking for advice on the best Ringlights and hoping it's a 'One Size Fits All' kind of deal, but if not I'm looking for someone to identify the camera itself as well.
Thank You, Confused But Well Meaning