Advantages: HSM, DC, great build quality, great fun Disadvantages: light fall off can be an issue
...this lens as my focal range was limited to 18mm at the widest end, and had always wanted a good quality super wide angle lens without the rediculous distortion you get from cheap bolt on imports.
I opted for the Sigma 10 - 20mm f/4 - 5.6 EX DC ...
Advantages: Good value for money, versatile Disadvantages: No image stabilisation
I bought this lens with a specific purpose in mind - photographing model aircraft in flight. I had previously used a Canon 80-200 mm which I found a bit too limiting at the long end of the range - an excellent lens, but not quite right for the job.
The ...