wsmith96 said:yorgasor said:wsmith96 said:dufflover said:Bit surprising they didn't do this sooner the more I think about it given it's one of the most commonly used (or at least wanted) lenses. Or maybe it's just taken them all this time to find an optical formula worth patenting against the current competition
I'm also surprised that it's not f/2. I think that Sigma was smart not to come out with this lens earlier. They focused on areas where there were opportunities against canon's offerings, but now those are becoming more scarce. It also gave them time to perfect their offering as it will have to be very compelling to dislodge the established canon base.
Do you realize how big the lens would be to be f/2? Look at the Canon 200mm f/2, the front lens is huge and has some serious weight to it. Now add some zoomable optics in there and the thing gets even bigger. The lens would also run $4-6k with glass that size. Are you sure you want it to be f/2?
Yes I do realize how big it would be. I didn't say I wanted it to be f/2 - just that I was surprised that Sigma didn't try to make it an f/2 based upon what they've been doing on their zooms.
What do you mean by "try"? Actually making one, in spite of it being oversized, and say "well okay... let's see what happens"? Or just doing research? In that last case, they may have done it, but I'm not sure any research is necessary to tell that fixed f/2 is a no-go for a FF 70-200mm lens. As others have explained very well, the challenge is already hard enough with a 70-200mm f/2.8.
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