something i did when starting out: first 2.8 lens i ever had was a prime 28mm. Shot loads of street with it. Scared myself to death shooting with the camera in a semi automatic mode; controlled the aperture, set the focus dot and locked it in place, then pulled the camera out of my bag and fired from the hip in a crowd or if i was trying to grab someone at close range.
i can see in 18mm, 28mm and 55mm. Tried it out when crew stopped for gas etc in Iceland.....with a heavy zoom.