>>3763956The Olympus 17mm f/1.8 is probably the defacto street photography lens. It's pretty fast and light and I don't think anyone can complain.
I'd recommend also getting the Olympus 25mm f/1.8 too if you like taking pictures of objects in a more open area. I took this pic the other day with the aforementioned 25 mm lens, and I kinda regret not taking the 17 mm with me since I couldn't get the whole building into shots.
I also have a Sigma 60 mm f/2.8, but that's been discontinued. The Olympus 75 mm f/1.8 is probably your friend if you wanna have a kinda telephoto.