Third Party Manufacturers / Re: Lensrentals: Tamrom 15-30 VC f/2.8 vs. Canon 16-35 f/2.8 II vs Nikon 14-24 f/2.8« on: February 26, 2015, 12:56:20 PM »
Like others here I am really awaiting Roger Cicala's first review of the new 16-35/4 IS. I personally never really understood why someone needs such a fast f/2.8 ultra wide angle lens, besides some event photographers shooting in dark environments using ambient light. Typical UWA applications are landscapes and cityscapes, am I right? f/2.8 would produce a much too short depth of field for such a purpose (maybe there are a few exceptions) - so mostly the big block of optical glass is not really used. I have e.g. a Zeiss 18/3.5 - and I never go below f/5.6 with that lens. Btw I use this Zeiss sometimes for street photography, because it can produce funny results, but again never completely wide open.
You can see in Roger's review that those big lenses needed for making such UWA zooms create a lot of optical problems, and no lensmaker so far can control this completely. For landscape and cityscape you need a lens that is really tack sharp right from the middle to the edges at medium and far distances. That's crucial, as many of you here in this forum certainly know. So I think it is quite logical that a less fast UWA zoom with a modern optical design should deliver overall superior results, because it is simpler to make it.
He actually already reviewed the 16-35 f4 - it about 6 months ago