I have had the lense for 3 weeks and during that time have used it both in the field and for some bench work with flowers. I have been very happy with all aspects of this lense, except the weight and I knew about that going in.

Consistent Output; Quick Focus; Rugged; Sharp Focus; Strong Construction

Heavy

Great all purpose lens- you may need no other

build quality; all rounder

"Jack of all trades; master of none

A great all rounder lens. A solidly built lens offering a great f4 across it's focal range. I bought this to replace an older 28-135mm and so glad that I did. I have used it for potraiture with great results, with the subjects expressing how clean and sharp the results were.

Consistent Output; Durable; Easily Interchangeable; Quick Focus; Reliable; Rugged; Sharp Focus; Sharp Optics; Strong Construction

I know there is mark II but this one is already an excellent lens, very sharp, works well with crop and full frame cameras, excellent all rounder. It is heavy and IS a bit noisy so probably not good choice for making videos but an excellent glass for stills.

Great lens; excellent Canon L (L = Luxury) quality! The zoom range is perfect for a carry-around lens; when travelling this is likely to be in front of your camera 90% of the time. Build quality is great, feels solid in your hands.

great picture quality; quick focus; not that expensive for L lens

none

This lens came as part of a kit with a Canon 5D. I used the camera on a trip to the Azores earlier this year and found that any images produced which showed the horizon, were unusable, due to the terrific curvature of field. Normal photographs i.e.

Inexpensive zoom lens

Suffers from severe curvature of field

If your going to buy 1 zoom lens to go with your Canon Camera this is the one to get! I use this with both my 1DS Mark 3 and my 20D. The lens performs great with the IS and I've hand held to a 1/15th of a second, with my Mark 3 and gotten tack sharp photos.

I have a few lenses in my kit, BUT this one is my favourite. It is light, compare to 24-70mm, f4 is more than enough for every day photography. It is very versatile and gives very sharp bright pictures. I would recommend it to anyone.

Great service, clear communication. Will order again in the near future. Just check your website for correct workings. I tried several browsers on several computers but shopping basket didn't work that day . . . :-) [Ed: Thanks - Have our team looking at that now!

This is a great sharp lens for everyday use, The price justifies the results.