CyberDyneSystems wrote in post #17275808
I find myself posting as if it's 2005 all the time.
My stand is that yes, the 100-400mm L DOES IN FACT beat the pants off the older SIGMA megazooms. I know I've owned a few them.
This is first hand knowledge, this is tried it and know for a fact.
This is also 2005.
Just because the 100-400mm totally outclasses the old 170-500mm and 50-500mm SIGMA ( pre- OS ) does not mean that times have not changed.
Right now Canon's new 100-400mm II is poised to play catch up. The Tammy (and these new Sigmas likely) have advanced past that stage that SIGMA used to be perpetually in.
As for the 120-300mm, this lens since Version 1 has never been in this class at all. If anyone thinks it is comparable too, or less than the 100-400mm, they are sorely mistaken. This zoom launched into that once rare class, the "Zoom that shoots like a prime".
A class once occupied by pretty much one type of lens, the 70-200s. Then along comes SIGMA nearly a decade ago with the 120-300mm, 100-300mm f/4 EX and the amazing 300-800mm f/5.6 EX. All of which joined that small club of zooms that defied the photographer to judge it as anything but a prime.
Canon now has a new contender in that market, the 200-400mm, but that lens followed the SIGMA offerings by nearly a decade.
So its easily possible to post from experience that sigma long zooms are 2nd class.
But, it is certainly not the whole picture, and it is in fact old news.
Just FYI form personal stand point there are exactly 4 long zooms I desperately want to own.
I DO want the new 100-400mm! My old one has been a trusted partner, and I love the size and weight.
I almost bought a 120-300mm just a few weeks back but financial trouble prevented it. This lens would not just fill a hole in my line up, it may replace a small handful as well.
When and if SIGMA ever puts OS on the 300-800mm, I'd like to own that one again. I'm still sorry I parted with the non OS version. I only sold it to pay my mortgage when I was unemployed.
I'd like to try all three of the 150-600mm zooms soon to be available and see if I';d ever chose one over lugging the 500mm prime around.