General picture lens, sort of the one i’d pop on when i dont know whats happening
a prime lens in no way fulfils this brief
whilst i enjoy using a prime lens, the edge it gives in sharpness, DOF etc are a massive price to pay considering the inflexibility it offers if i’m only carrying one lens.
look at the offerings from Sigma/Tokina et al. You want a mid range zoom, like the Sigma 17-70mm f2.8-4 (£328.00 from warehouseexpress) or similar. then have a look at reviews on the web. check ebay as well.