Tapeman wrote in post #18332489
What comes close to Canon's 100-400 II and 24-70 f/2.8L II, or for that manor Canon's super tele lenses? Don't forget I said cost is not a factor.
Nikon's 24-70VR at least matches (and in some areas beats) the Canon mk2 in the centre of the frame but at the rule of thirds and further out, beats it handily and has VR. For Canon shooters though it's F and not EF mount.
The 100-400 II from what I've seen doesn't have an equal for the combination of portability, AF, IS/VR/VC/OS/whatever you want to call it, focal length range and IQ regardless of price.
Sigma has some out-of-the-box-thinking lenses such as the 18-35, 24-35, 50-100, the already mentioned 120-300, 300-800 and 200-500/2.8 just off the top of my head. They also had the 50-150 (and Tokina the 50-135) f/2.8 zooms for crop before discontinuing them
Tamron has the recent 35, 45 and 85 f/1.8 lenses all with VC. Nothing from Canon in those focal length ranges have apertures that large (for their focal length) with IS (though Canon's 35/2IS comes close). Tamron also has a wider f/2.8 ultra wide zoom than Canon.
Canon though as we all know has some spectacular lenses that no one matches (to my knowledge). The 11-24 is a wider rectilinear zoom than anything else out there for "full frame", and from what I've seen it's brilliant. There's also the 8-15 FE. Then there's the 50 and 85mm f/1.2 pair. Then the 200-400 with built in TC. I believe they were also first with DO (400 DO, 70-300DO and 400 DO II) and their 17mm TSE has only just met with competition from Nikon in the form of a 19mm. I can't talk for Sony, Pentax, Olympus and co but Tamron, Sigma, Tokina and Nikon do not make a small, light 200/2.8 prime - actually, none of those make a 200/2.8 prime
My favourite lens though that Canon does not make is the Sigma 150 macro. Yes, there's the Canon 180 macro but there's also the Sigma 180... (another on the list I'd like to get) The Sigma 150 also adds excellent all round handling that the old Canon doesn't have. I've had a few in EF and F mount and they've done everything from 1:1 macro, extension tube macro, general walkaround, portraits, landscape and motorsport. My F mount 150's over the past 3 or 4 years have also spent a lot of hours on the front of Omega and FinishLynx photo finish cameras delivering excellent IQ, bright aperture and (on the Omega's) fine remote focus control.