Canon just announced a couple of brand new lenses, one of them being the EF 16-35mm f/4 IS L series lens. I was super excited about this announcement because the Canon EF 17-40mm f/4 L lens was my bread and butter lens for many years and this new lens seemed like the perfect upgrade.
I was hoping to share my excitement with other folks around the web until I started seeing a barrage of anger towards the announcement of the new lens! A lot of people were upset that Canon had released a wide angle f/4 lens with IS rather than a replacement to the 16-35mm f/2.8 lens. I can sort of see where people are coming from, but I still think that the new EF 16-35mm f/4 IS L was a good choice on Canon's part.
There aren'y too many sample out there from this lens, and there probably won't be any of a while, but the MTF charts that Canon published show that this new EF 16-35mm f/4 IS L should be a significant upgrade from the current Canon EF 17-40mm f/4 and the EF 16-35mm f/2.8. That, alone, should get people excited.
Up to this point, Canon did not have an image stabilized ultra-wide angle lens in their catalogue. There are those that argue that image stabilization in a lens this wide isn't necessary, especially when most of those that are going to use a lens this wide will be using a tripod.
With image stabilization in a lens this wide, you won't need a tripod! Okay, that's exaggerating a bit, but really, IS on a 16mm lens and you should be able to get usable shots handheld at up to a 1 second exposure!
The other huge benefit to image stabilization on the 16-35mm is its use in video. A lot of people are ditching their rigs these days in favor of handheld video and having IS in a lens is key to making a setup like that work. IS on the 16-35mm will make a pretty sweet video lens.
I just picked up a Canon EF 24mm f/2.8 IS, so I'm probably not be picking this lens up for myself, but I'm going to try to get a hold of it to review once it comes out. This is going to be a hot seller, I know it!