8 out of 10 points and recommendedSharp, well build, easy to handholdno USM, no IS
This lens is a true alternative to the bigma. it's very sharp on both the 20 D and the 5D from 100 to 400, and it's sharp at 500, even if you need to stop down for increasing the sharpness in the corners. The maximum chromatic abberation is encountered at 500 mm, but it's not that bad.reviewed February 9th, 2006 (purchased for $1,200)
It's well build, easy to handhold (1200 g), have a not so bad AF (but not USM). The zoom ring, and the MF ring are smooth. If you want something sharper at 500 than this zoom, you have to take a prime.
9 out of 10 points and recommendedOptical quality, AF, build quality, internal focusing, hold well the 1,4 TCa little soft wide open at 300
I tried this lens on several cameras : 10 D, 20 D and 5D. It's sharp at all aperture and focal lenght except wide open at 300 where it's a little soft.reviewed February 14th, 2006 (purchased for $1,500)
So at 300 mm, I will recomand to stop down at F5,6 or more.
It hold well the 1,4 TC if you stop down at F8 at 420 mm.
The build quality is superb, the lens is a little bit heavy, the internal focusing and zooming is great. The AF is on par with the best USM from Canon.
This is a very nice lens, but I would recommand to use a monopod with it. It's one of the best sigma zoom
9 out of 10 points and recommendedOptical qualitySlow and noisy AF
This lens is very sharp, well build. It only lack USM.reviewed February 16th, 2006 (purchased for $450)
10 out of 10 points and recommendedProfessional tool with oustanding IQ
IQ wise this lens is great even wide open.reviewed August 17th, 2006 (purchased for $6,000)
Still great with the TC 1,4
just good with the TC 2 (but a bit better on the 5D, than the 20 D)
The AF is fast (just average with the TC2 : you should limit the AF range here)
The build quality is fantastic
You can handhold it , but not during minutes.
The IS is a fine improvement especially in this focal range.
This lens is one of the best 300 mm lens, and one of the best canon lenses. Wide open it's the sharpest of nearly all canon lenses.
10 out of 10 points and recommendedVery good IQ : one of the best for a 35 1;4 mm on an APS camera.nothing
This is a must have lens, on the X pro 1. It's very sharp wide open, and good from center to corners at F2,8 and smaller aperture. The bokey is very nice.reviewed June 8th, 2012 (purchased for $500)
The AF is rather fast (for the X pro 1 camera).
8 out of 10 points and recommendedvery good IQ at avery aperture at the center.Purple fringing, the corners are never as good as the center
It's not a landscape lens, at least, if you want to print at A2 or larger.reviewed June 8th, 2012 (purchased for $500)
It's a very good lens for street photography.
It's the fastest AF lens in the current FX line.
The bokey is very nice, and it's very sharp at the center even wide open.
9 out of 10 points and recommendedOutstanding Image qualityslow AF , only 1/2
IQ wize, it's the best lens for the XP . Sharpness is incredible, bokey is very nice, there is no AC, no vignetting and no geometrical distortion.reviewed June 8th, 2012 (purchased for $500)
It's a flawless lens.
The only cons is that i's only 1/2 , and the AF is rather slow (quite normal, for a macro lens)