ya.. its kinda of hard to decide.. not just concert.. family gathering, party all these.. I need to use a UWA because of space constrain.. but I haf not been able to test my flash with the lens yet.. so its kinda of bothering me about the effect if I were to start using flash if it was to be shot in door. I shoot normally using the 2nd curtain.. Kit lens outcome was fine for me. But then most of the time space constrain is a bother to me cause my kit lens cannot work in a space constrain space especially like homes where Sengkang those kinda of housing.. its just simply too tight for me to take using kit lens when we have furniture all these..