This lens from Sigma is in a class of it's own! Nobody else makes anything like it! Nothing else (apart from it's prime brother) that you can buy off the shelf for less than the price of a house has this sort of reach. So why have Sigma gone to such extremes? We take a look.
Excellent picture quality; Astonishing focal range; Fast and silent autofocus; Good price for the capabilities
Big and heavy; Could benefit from a focus limiter; Closest focus at 6m is a bit far; Case leaves a lot to be desired