Readers of this blog will know that earlier this year I toyed with the idea of buying a 11-24mm f/4 Canon lens but I tried one out again recently and decided that it was just too big and heavy to justify replacing my 17-40mm f/4 one.  Instead I decided to buy a 16-35mm f/2.8, partly because it's a little bit sharper and has an improved autofocus, but mainly because it's one stop faster, which in high ISO situations can make a noticeable difference to the amount of digital noise that my 5D Mark III sensors create.  I ordered it from, my favourite online store, and I tracked it all the way from Hong Kong to its arrival at my house today, just in time for an event tomorrow night where I know I'll need that extra stop.  The circular aperture diaphragm on this lens also gives out of focus areas a softer look, an effect that DigitalRev call "bokehlicious".  Their YouTube channel has just hit one million subscribers, another community I'm pleased to be part of.