Lenses

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Cons: Poor build quality & AF accuracy, soft in wide open

Pros: Good price, Nice image but you must stop down to f4

Summary: Don't think about it, just take the picture

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Cons: Slow and noisy AF. No IS.

Pros: Sharp in wideopen. Cheap.

Summary: Good lens in range 17-50mm. Best for Pentax, sony.

Build quality
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Value for money
Overall

Cons: relatively slow and very noisy AF, not very tough build quality, focusing ring rotates during AF

Pros: PRICE, optical quality - sharp from wide open, nice colours and contrast, internal focusing, very good bokeh

Summary: "cheap" standard zoom lens for everyone, performs as it had hidden L-grade canon glasses inside :), almost as sharp as canon 17-55 which costs more than 900EUR. Ideal lens for shooting where you do not need extremely fast AF (all but sport)

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Cons: no af override(sadly), no stabilization, only for DX af ring gets a bit in the way

Pros: The best PRO wide zoom in my bag! forget the nikons!forget the 17-55!forget the sigmas! i've checked and tried everything in the 24-70 equiv. range,as i use it a lot,and if you have any doubt go straight here.Nice handling,SUPERB image quality,decent at 2.8 and look what happens if you close it a bit to f/3.5-5! Even distortion and vignetting -if not corrected in post production,camera raw has a profile for this lens- manage to look pleasant,like 1-2 thousand euro nikon lenses(which i've got)!

Summary: Need a zoom in the 17-50 range?go get it. Don't confuse this gem with the poor VC version. This is not a great lens "for its cheap price",this is a great lens,this is THE lens to buy in that range.End of the story.

Build quality
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Overall

Cons: AF loud and slow, random accuracy, wide open soft

Pros: you can take pictures

Summary: i sold the lens

Build quality
Optical quality
Value for money
Overall

Cons: Smearing at the extreme edges, soft wide open(no big surprise there), AF hunts in low light

Pros: Light, Sharp at f4, low flare, low CA

Summary: An enjoyable lens, practically glued to my camera for the last year. For a zoom at this price it is an excellent value. The AF is sloppy compared to the EF85 1.8 USM, but is better then the EF50 1.8. Bokeh is a bit harsh, out of focus circles have a hard edge to them.

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Cons: Excellent image quality. Very sharp from f4.0. It makes your prime lenses redundant! Very light lens.

Pros: No image stabilizer

Summary: This is one of the best lenses for the cropped sensor cameras. Great resolution and rendition of colors. This is the best value lens for your cropped sensor camera

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Cons: a bit soft at 2.8, at Canon a bit dull colours, focus dizzy

Pros: sharp, prize, nice allrounder

Summary: Iam using this good lens with my Pentax K 20. I bought it used for 220€, so a big deal. Before I used the same lens with Canon, but I sold it, because it produced dull colours (Canon only produce nice colours with L-glass or the 10-22+15-85). Very sharp, good corners, few CA´s and few vignetting.

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Cons: none

Pros: sharp ,f2.8,good color rendition, good value, reasonably quick accurate focusing and a little buzzy ( so what ),accesable manual focus ring,

Summary: you can spend 3x as much on a canon and get similar performance. IS model of tammy may be an option for $200. upgrade over kit,good focal length to go with 55/250 canon and a super wide. on crop body good portrait length

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Cons: very slow focus

Pros: yery sherp

Summary: yery good walkaround lens for APS-C

Build quality
Optical quality
Value for money
Overall

Cons: slightly underwhelming build quality, a bit noisy, af/mf switch small and inconveniently placed, distortion @ wide end, and focus ring sometimes touches finger because it's so close to the zoom ring.

Pros: wonderfully sharp for the price, small & lightweight for being a fast lens, no lens creep, and great contrast + saturation of images. f/2.8!

Summary: (on a nikon d90) I LOVE this lens. i opted to forego the kit lens on the D90 for the increase in f-stop and am very happy with my choice. the cons listed are EXTREMELY minor and I got used to them within a few weeks; especially when i figured in the money i saved compared to a brand name lens. This is the perfect starter lens / walk-around lens for DX bodies and is the lens on my camera 80% of the time.

Build quality
Optical quality
Value for money
Overall

Cons: Autofocus is rather loud, not fully recommended for wedding photographers. Not weather sealed (but cannot be expected at this price tag!). Slight vignetting, but not disturbing.

Pros: Very sharp images, good for low-light shooting, good built quality, extermely cheap for what it offers

Summary: Highly recommended Lens for Canon 1.6 crop camera owners. There simply ain't any better "standard lens" for the EF-S mount available... yet.

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Cons: Some visible chromatic aberrations at wide angle. Autofocus is quite loud with its high-pitched buzz

Pros: Very sharp from f/2.8, fast autofocus (seems slower than it really is because it's quite loud) Good build quality, nothing is loose, nothing wobbles.

Summary: Excellent lens for APS-C, sharper than even Canon 17-55 f/2.8 Very nice design :) Oh, and it comes with a lens hood.

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Cons: cons

Pros: pros

Summary: summary

Build quality
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Value for money
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Cons: Blokeh not that smooth

Pros: Great in low light Scharp

Summary: This is a good lens, good build quality (although could always be better = als heavier).

Build quality
Optical quality
Value for money
Overall

Cons: Awful distortion at wide end. Slow, erratic focus (sometimes).

Pros: Very sharp, even wide open. Perfect size/weight. Overall, excellent value for money.

Summary: Perfect walkaround lens for APS-C sensors.