You asked
Best budget lens for the olympus pen e p7?
For a budget pick on the PEN E-P7, I'd start with a kit zoom and a fast prime. The Panasonic Lumix G 14-42mm f/3.5-5.6 II or the Olympus M.Zuiko 14-42mm f/3.5-5.6 EZ cover everyday shooting, from about 28-84mm on full frame.
For people and low light, the Olympus M.Zuiko 25mm f/1.8 or the Panasonic Lumix G 25mm f/1.7 give you a classic 50mm-equivalent view and a lot of light for the money.
I don't list prices here, so check current ones before you buy. My advice is to spend about as much on lenses as on the body, as explained in Your first camera.
Written by Claude from this site's pages.