Summary: Pros - Great image sharpness Focuses quickly Manual focus is very accurate Zoom lock prevents damage while traveling Minimal chromatic aberration Cons - Zoom can be difficult to fine tune Trouble focusing at maximum/minimum zoom(manual focus can fix this) Lens covers are cheap and pop off easily...
Review by an experienced but non-pro level hobby photographer.
R. Olsen, Amazon
19 February 2016
Summary: I purchased this Canon zoom lens with full knowledge that I was not buying the extraordinary pro-level picture quality that Canon provides in their L-model Pro-lens line, but to be very honest, I have been very pleasantly surprised that a lens that sells for less than half the price of a comparable...
Summary: I love this lens. It's my go to for shooting nature. I have even gotten some great shots of the moon with this lens. I also use this lens photograph my son playing baseball. I have added some photos to this review because seeing is believing.
Excerpt: After a lot of research and price comparison this is the lens for me. I wanted to go full frame so my ef-s lenses won't work on that. I wanted to buy only L glass for my new 6d. I first considered the 28-300 and the 100-400. Aside from the cost they are both push-pull zooms that I don't like.