Excerpt: Good, quality product that you'd expect from Canon. I found it much sharper in the corners compared to the less expensive Tamron competitor with both lenses at F4.Glad I spent the little bit extra on the Canon.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Rugged, Strong Construction
Excerpt: An excellent addition. Great lens, super sharp images, well made. Compact, and not the heavy monster that is the 24-70mm F/ 2.8, which makes the f/4 a great all around lens to carry and capture life.
Pros: Durable, Lightweight, Rugged, Strong Construction
Excerpt: Got this lens (and the 70-200mm f4L) for my 60D as a replacement for my Tamron 18-270, which I found to be so-so, especially at the telephoto end. I have been looking at the L lenses for quite a while and finally took the plunge. Glad I did. Much sharper than the Tamron. I use this lens as my primary "walk about" lens and have been very happy with it.
Excerpt: I was considering the purchase of the EF 24-70mm f/2.8L II USM, but grudgingly concluded that image stabilization was more important than a stop of speed and purchased the EF 24-70mm f/4L IS USM instead. So far, I am reasonably pleased with the lens. The auto-focus is fast and accurate, and the zoom and focus rings operate very smoothly with just enough resistance. I like that the lens locks at 24mm for carry.
Pros: Fast / accurate auto-focus, Nice Bokeh, Strong Construction
Excerpt: The lens was well put together. It had a nice feel to it. I didn't care for the macro because I already have the 100mm lens which performs much better. I felt the lens was rather limited in reach. If you don't already have the macro lens this lens might be a very nice addition.
Summary: I received my order quick, sooner than expected. I purchased it refurbished and can say in perfect shape, not a mark on it. The focus is fast and sharp on my Canon 6D. It also has a Macro feature although it's not 1 to 1. I really have no complaints except for the price. I think it's way overpriced, But it does have the red ring. I have a Tamron 17-35mm that's just as sharp and cost 1/4 the price brand new. One nice thing is it's weather sealed.
Excerpt: I just purchased the lens and havent used it much yet (reason for 4 stars). Out of the box and on the camera (Canon 5D Mark III) - the lens has some heft, but it's solidly built; the "lock" feature is great (no lens extending when in the down position); image quality appears to be very good. With today's high ISO's available and processing software the f4 has not been an issue thus far. After more use I'll do an update.
Pros: Easily Interchangeable, Fast / accurate auto-focus, Strong Construction