All ¨L¨ Lenses in One Package.

Gaston Bonaudi wrote:

I have bought my 28-300L some months ago and use it all around Galapagos Islands and Easter Island..
I think I'll will never find a better lens like this one.
It is totally awesome, perfect match for my 7D. The image quality is superb. The auto-focus is really-really-FAST and silent.
I was a little disappointed using it at high ISO... it doesn't look ¨too¨ sharp as I expected to be an L lens of this price tag, but besides that the picture quality is outstanding. For video it's a little difficult to handle and control the manual focus compared with other small lenses, but is not a big issue (while handheld).
The weight... well.. it's literally like a bazooka, but you will get used to it.
This lens worth every cent you pay. You have all the range covered with the outstanding ¨red ring¨ quality.
I will just add my super-wide angle 10-20 for some special shots.
¨...Be prepared to some: "whoa!" when you get the camera out of your bag.¨
Pros: Fast Auto-Focus, Superior Build Quality, Super-Sharp Images, it's an all-weather lens..
Cons: Semi-Sharp Images, Difficult To Manual Focus For Video Shooting.

theoretically and from what i have head is that telephoto lenses that cover such wide and long FL, do have weaknesses at some point of FL it covers! that is the reason i have a 24-70f2.8II and 100-400 II that covers wide and long reach but they are very superb! YMMD