Sigma 100-300mm F4 EX DG IF APO A-mount lens review by bluedepth
|bluedepth#2123 date: Apr-7-2007|
flare control: 5
|ownership:||I own this lens|
|compared to:||Minolta 70-210 f4 (beercan)|
Sigma 70-200 f2.8 EX
|price paid:||900 USD|
Incredibly sharp at f6.3 and above
good sharpness at f4
Great build quality
focus & zoom rings are wide and have a very nice feel to them
|negative:||very large 82mm filter size (needed for f4 at 300mm)|
Tripod collar gets in way of zoom... should be taller
|comment:||This is one of my favorite lenses. In terms of sharpness it comes very close to the IQ of the 70-200 G and SSM lenses out there by Minolta and Sony, and costs half as much.|
The focusing speed on my 7D was okay, but nothing special. On my film Minolta 9 it was noticably faster. Because it is NOT an SSM lens, the focusing noise is pronounced.
Build quality is excellent, with a nice textured metal body. It is a bit heavy, especially compared to the plasitc-bodied offerings out there.
The tripod collar is shorter than it needs to be, meaning with it on it gets in the way of my fingers when I'm using the zoom ring. Reversing the collar solves the problem, but then puts the tripod mount slightly behind the center of gravity, which means on a monopod that the lens will 'lean forward' ever so slightly and want to tip over, but it isn't so drastic a change to be worrysome. just keep your hand on your monopod.
the hood is huge, and seems effective at blocking flare without clipping any of the image.
Bokeh is extremely good. It is such a pleasure to get images where the subject is tack-sharp and the OOF areas are pleasing as well.