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Cons: Not Weather Sealed. Not the sharpest lens f3.5-5.6 is annoying at time Poor low light Noisy and sometimes inaccurate focus system

Pros: Versatility Value for money Focal Range Macro

Summary: Overall a solid lens for a beginner. Excellent focal length. Maybe I'm expecting too much. A great all round lens for travel!!!

Cons: Just as well it has a zoom lock, as zoom creep is a real problem. No USM, so you have to switch to manual focus if the AF doesn't get it right. CA often a problem; if I see it, I address in RAW.

Pros: Wonderful zoom range - this could be your all-in-one lens. Very good optical quality - I compared mine to an EF 24-105 and saw almost no difference. Close up ability good enough to make taking a macro lens with you not often necessary.

Summary: This could be the perfect Canon travel lens. It's the one always on my 60D.

Cons: IQ

Pros: zoom reach

Summary: All other superzooms I tested are better: Nikkor 18-200 VR, Sigma 18-200 OS, Sony E 18-200 OSS, PanasonicLeica 14-150 OIS

Cons: The zoom creep is annoying if you need to shoot pointed downwards, especially when mounted to tripod. In general, IQ is soft at extreme borders, but improves to an acceptable level when stopped down to f/8-11, in mid-range even to very good. Weak at 18mm setting, it needs to be stopped down to f/11. >18mm it is actually OK. Beyond f/16 IQ decreases. Shows some resolution limitations at >15MP.

Pros: Very useful focal range. AF-speed & acuracy is very good, even without USM. Image center is clear and crisp, especially if you use it at sweet spots! Lens compensation settings in LR3 work very well for improved IQ.

Summary: A very convenient lens for family photography and trips with minimal equipment. Image quality is good enough for most hobby photographers even at 18MP, much better than bridge cam or P&S.

Cons: Zoom creep is serious! Slow Not a USM AF system - bad move, Canon

Pros: Great range Easy to work with

Summary: I am pretty happy with this unit - build is decent, range is excellent, and I have gotten thousands of great images out of it without having to do much post work. Best walk-around lens I have owned!

Cons: CA easily seen in extreme contrast shots. Softness can be seen in some subject pictures.

Pros: Good handling, reasonably sized lens. Solidly built. Reasonably quiet and fast AF. Good bang for buck. Excellent resistance to flare, compared to its rivals.

Summary: [ Please correct the marks on my last review. I'm submitting it again with corrected ratings ] I own a 5D mark II bought with the 24-105L lens. I also own a copy of the 70-200L mark II. I bought this lens for my wife for her new canon 60D. I found myself or my most recent trip to Europe feeling quite jealous. Examining pictures carefully the image stabilization on this lens is better than the 24-105L. On her camera this lens had more reach than my 70-200L. Carrying my kit of two lenses almost caused my arm to fall off. But she could put her camera in her purse. This is the perfect travel lens in my opinion. It will satisfy most APS-C users who are not purists. I wish there was something reasonably priced and capable for use with my 5D. I'd buy one without reservation. I highly recommend this lens. It's got a good balance of sharpness, cost and an outrageous zoom range.

Cons: strong chromatic abberations away from center, not very sharp. Fairly small largest aperture. 3.5-5.6

Pros: light, large zoom range, IS, relatively cheap. Short closest focus distance, good for semi-macro shots.

Summary: Very good overall lens, Landscape images always need corrections due to high CA at all edges. Very convenient travelpartner.

Cons: Chromatic aberration with UV filter and lens hood. Vignetting with UV filter and lens hood. No Focus indicator on the lens

Pros: Great "overall" lens. 18mm on 1.6 crop still very wide Sharp for a super zoom

Summary: Overall a very nice lens if you don't know what you want to photograph. Its sharp for a superzoom, build quality is what you expect from Canon, only down side is the chromatic aberration, vignetting, and no focus lines on the lens. But the chromatic aberration and vignetting is easy to fix in photoshop, and since you usually Auto Focusthe focus lines on the lens are not really necessary only handy.

Cons: Chromatic abberations at the edges - strong at the both ends of the focal range. However - easy to correct in PP. Not the sharpest tool in the shed :-)

Pros: Very convenient focal range for walk around / travel purposes. Great value for money.

Summary: Highly recommended general purpose lens.

Cons: Slight chromatic abberations at the edges at 200mm Focussing can be slow at close range

Pros: Very good viewrange Sharp and detailed results Image Stabiliser (IS) is very good at all ranges and made 1/15 shots from hand possible for me

Summary: Very good allround lens for starters or people who don't want to swap lenses all the time.