I love this camera... I take railroad photographs and it is awesome. Wish it had more mm, but for the price it is plenty. Photos are amazingly sharp, even with the 1.4x extender. Focus is fast and silent.

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

Heavy; Scratches Easily

The Canon EF 70-200mm f/4 USM L IS is capable to deliver a near-flawless performance is all categories. The resolution figures are very impressive even at max. aperture. Distortions, vignetting and CAs are usually nothing to worry about either.

This is one of my "trinity" of zooms I use on my 40D and 50D. If you never have tried a a professional level lens (they are called "L's in Canon-ese), you will be shocked at how smooth and solid a lens like this is!

Very affordable.

There are many uses for the Canon EF 70-200mm f/4.0 L USM Lens, but portrait photography is one of the best. Outstanding image quality.The most dazzling lens in my bag.

Consistent Output; Durable; Easily Interchangeable; Lightweight; Strong Construction

Poor in Low Light

I bought this very lens about 2 years ago. I love it. The pictures I take with this lens looks like a professional has taken them.The telephoto lens is a must have for taken outside pictures.

A compact telephoto zoom lens from Canon's 'L' series.

Excellent optical quality; Superb build quality; Very effective image stabilisation; Fast to focus; Sealed against weather and dust; Light weight

Sometime miss-focuses near minimum focus distance

For years I have looked at the Canon 'white' lense and wanted one. Now, due to being able to upgrade to digital and Smifu's amazing prices, I actually own one. What a lense! Lighter than I expected and much clearer than the old Canon lenses (I got all my old gear out to compare).

This has been one of the best lenses I have ever had as a multifunction lens the best it the canon 50mm f-1.2 L series This lens is in addition to several other "L" series lenses that I own I shoot with a 5D Mark II, Canon 7D and the 450D (aks) the SXi.

I decided on the f/4. I was against the f/2.8 because it's twice the price, twice the weight and a fatter lens. (Then again, you need more glass for f/2.8...)I've been very impressed with the image quality. Every image I've taken has been razor sharp, with no noticeable CA.

Fast focusing; sharp; very lightweight; cheap alternative to the f/2.8 version if you can live with f/4

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