Images author

Good day,

grateful to help me if possible the following:

I have a news site where the author of the news are identified using the option provided by the template, however, and because most of the time the author of news and photography is not the same needed to have a field to identify the author of the photograph, anyone know any plugin or method for doing this?

We currently have this:
Author: Peter P. Pinto – 15 December 2014 at 16:11

We wanted something like this:
Author: Peter P. Pinto – 15 December 2014 at 16:11
Photos: Luis Santos

I thank you for your help.