Do not normally photograph people events but it looks as if I will be photographing a christening. I have a 35mm 2.8 lens a 50mm 1.8 lens and my old faithful, my 16-85 vr lens. Since we will be in a church and I do not want to use a flash what is my best choice of lens? Only have one chance to get this right. Would appreciate any feedback from those who shoot functions like weddings, etc. Thanks to all who answer.