The list author says: "This list should help to compare and shop for Canon's higher quality lenses, their L-series lenses. They're color-coded with a red ring. This list contains only prime or fixed focal length lenses, not zoom lenses in the L-series. It also does not include the larger, more conspicuous L-series lenses with the beige exterior. This is only a list of the black, prime L-series Canon EOS lenses. Basically, Canon's best non-zoom lenses for people who don't want to be so showy."
"This baby has a diagonal angle of view of 114 degrees, with a clear image all the way through. If you shoot level, you won't get distorted images, unless you want them. It's excellent for photographing landscapes, buildings, and interiors. The hood is permanently attached, so no front end filter--have to use a rear one. There's a good review of it on the-digital-picture site that explains more."
"This one is a nice alternative if you don't want to spend the money on the 14mm, but still want a wide angle. It has a diagonal angle of view of 84 degrees--not as spectacular as 114 degrees, but still impressive. However, 84 degrees may be more manageable. It also has a larger maximum aperture, which will work well for interior shots and quick street shots."
"This lens has a tilt-shift feature to it: those knobs on the side, making it look like Frankenstein's monster's neck. This feature will allow you to improve depth of field even though it's such a wide angle, even when set to largest aperture. It corrects the trapezoidal effects that you get when you take a picture of a tall building. Basically, this lens is a somewhat specialized one."
"This is a good focal length for portraits and generally close shots. It's also good for street photography (e.g., where you have people and maybe a open plaza). This used to be the standard focal length and it's still a good one."
"I own one of these lenses. It's such a nice lens. Because of the wide aperture allows you to blur the background while taking a crisp portrait. It's also good for taking pictures of people in a crowd--on the street or at a party. It's so quick, you can snap off a shot even at close range before they notice you."
"The 85mm focal length is a good one. I have one and love it. With the large aperture and the great quality of it being a prime and of the L-series, I can use it to take pictures inside (e.g., a cathedral with high ceilings and low lighting), as well as outside (e.g., city skylines on dark nights)."
"This is Canon's new macro lens with their hybrid image stabilization. This image stabilization is different from their other lenses. Their are some advantages to it just for macro photography, but it's not quite as useful as you might think. Check out dpreview's site for detailed review on it. IS aside, though, it's still a spectacular macro lens."
"This focal length is excellent for taking pictures of people outside. By the way, the best photographs to take when traveling that will give you the feel of a city is of people at work or play. Since most people are terrible at posing, you need to take their picture from afar so you won't disturb them. A lens of this size or the 200mm are excellent for that."
"Here you have another excellent macro lens. It doesn't have image stabilization like the 100mm model, but if you're taking pictures of very small objects, you should use a tripod anyway. In which case, you'll get less camera shake without IS on."
"As I mention in my description of the 135mm lens above, this focal length is fabulous for taking pictures from a distance without disturbing your subjects. It allows you to photograph them naturally. For some situations, you may want a more personal shot showing people's emotions. This size works well for that, and the quality is so good you'll get great images, too."