For those of you who are interested in this glass' flare characteristics: I was out night photographing tonight because I was bored and ended up unknowingly testing the 16-35 for flare. I do have a B+W uv-filter on it, but a separate test shows exactly no difference between a naked lens and uv-filtered lens so don't jump on my back unnecessarily; the uv-filter makes _no_ difference, I've checked. Now regarding the flare: I shot straight into several light sources. I expected some flare. I haven't yet used any glass that is completely flare free when shot into a light source. What surprized me was the sheer amount of flare. It's everywhere! As much as I like/love the 16-35, it's not going to be my night photography glass I don't think. Too susceptible to flare and I shoot cityscapes a lot. Inside, sure, there isn't any problem. During daytime there isn't any flare problem with it either, but it's during night photography that the 16-35 becames close to unusable. As a comparison, my 24-70 rarely, rarely flares.