At the WPPI Convention Trade Show, cont'd...
SIGMA had a very respectable booth set up for their lenses... and I made a beeline to the one I was most interested in:
The newest SIGMA 120-300mm F2.8 EX DG OS APO HSM
Now, to be fair, I also grabbed the standard SIGMA 300mm F2.8 EX APO DG HSM, a "PRIME", for comparison purposes.
I swapped the lenses for a good half hour, on a Canon 5DMkII camera body. Why a Canon? Well, mainly because the Canon-mount was what they had at the show, but also because SIGMA, in its infinite wisdom, decided not to manufacture this particular lens in the SONY(Minolta)-mount... and as such, missed that sale opportunity.
Anyway, back-and-forth I went, shooting this and that... immediately doing an ad hoc comparison between the two lenses. My friends, swapping $3000+ "five-pounders" back and forth is not for the meek of heart. The result clearly showed that the 120-300mm f/2.8 ZOOM lens shot a more finely focused image, at the f/2.8 aperture, than the PRIME did. Now, admittedly, I was shooting w/o a tripod... and the 120-300mm f/2.8 has stability in it, so the prime was disadvantaged, but I balanced the lenses on the counter, to steady them, because seven pounds of camera is... well, let's just say it is "a challenge," when you are not used to it.
I even made a comment to the guy at the counter, who was looking a little nervous through all this, and he agreed, "I noticed that, too."
Now, either the PRIME lens was out of whack (hey, it's possible...) or this "newest" zoom design is just awesome. Like I said, if they had had a SONY-mount... it would have come home with me. You have no idea how frustrating living with that kind of marketing stupidity is. All mounts should be represented.
Regardless... the 120-300mm represents the kind of lens that I would gladly invest in, over the "You're stuck at 300mm 7/24, MATE!" I would find the zoom a carload more useful... and maybe even preferred over the wider focal range of the somewhat lighter (and that's saying something) SONY 70-400mm f/4-5.6 G SSM.
You can sing and dance around this all you want. I sought out my answer, received it, and if you are not checking this comparison out, your own fine self, you are just missing it... and I suppose that speaks for itself. :cool: Nice work, SIGMA... now, make it in the SONY-mount. I wants it.