Nikon just doesn't have the money to compete, I'm friends with one of the Nikon glass people, as in the people who make the glass, he's just depressed each time I come over with some great Canon lens (I showed up with the 400mm f4 DO which is identical in size to the 200mm f2, he was stunned they could make a 400mm that small with optics that good).
I whole heartedly disagree that Canon is coasting. Years ago they knew that they would make a 50Megapixel camera and they started redoing their lenses to resolve details at that pixel size. Go look at the mark II lenses, the 70-200, the 300/400/600. Go look at the bodies that do 50MP, the landscape people love them.
Canon is investing heavily into bodies and glass.
That said, I've got the Sigma 85mm ART and have looked at other Sigma glass. Couldn't be happier with the optics, they are still behind in the auto focus speed. If that's not an issue then Sigma is killing it and that's a good thing.
I whole heartedly disagree that Canon is coasting. Years ago they knew that they would make a 50Megapixel camera and they started redoing their lenses to resolve details at that pixel size. Go look at the mark II lenses, the 70-200, the 300/400/600. Go look at the bodies that do 50MP, the landscape people love them.
Canon is investing heavily into bodies and glass.
That said, I've got the Sigma 85mm ART and have looked at other Sigma glass. Couldn't be happier with the optics, they are still behind in the auto focus speed. If that's not an issue then Sigma is killing it and that's a good thing.