Sigma considers this lens as one of it's Flagship lens. Inspite if that here are the pros and cons of the 35mm F/1.4 Art lens
What are the pros and cons?
That's a valid question and probably one I would ask if I wasn't a photographer. It may seems like you're getting exploited when it cost $500.00 or more for a one or two hour photo session, especially if the session doesn't come with any prints. How can photographers get away with charging $200 to $500 (or more) per hour and why do they do it?
Review: Canon EF 28-105mm F/3.5-4.5 II USM Zoom Lens
The Sigma EF 610 DG Super Speedlight Review
Need an affordable sports or wildlife super telephoto lens? The Sigma 50-500 APO DG OS HSM Super-telephoto lens might just fit the bill. The lens is light enough to use hand held but powerful enough to fill the frame with wildlife at a safe distance. What's best is that this lens is effectively an 80-800mm lens on a crop sensor body.
What is a STOP?
In photography a stop is the exposure value plus the difference of twice the amount of light to increase the exposure value. ½ the amount of light decreases the exposure value a stop. Fortunately, we can use the camera's built in light meter to figure out a given exposure value.