Overall, this is a very good lens that every filmmaker should have in his bag. Yes, I use my DSLR primarily for filmmaking and have found the 20mm focal length to come in handy a lot of times. Very sharp image given its price point. Definitely a good lens to have in the bag!

It is in great shape and takes awesome pictures

The optical construction is made of 12 elements in 11 groups without any special elements. Its aperture mechanism features just 5 aperture blades so a pleasing bokeh was probably not on the design priority list nor is it really needed for the majority of applications of such a lens.