Lenses

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Cons: poor manual focus ring causing pinpoint focusing very difficult, loud autofocus, persistant front focusing(very annoying), hi degree of missfocusing in lowlight.

Pros: very good optical quality for this price, upto f1.8, almost no CA,.

Summary: only buy this lens if IQ is your prime importance & you tight on your budget.

Build quality
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Cons: All plastick

Pros: Sharpe, colors, good for night (low light) esepcialy if your camera cant go more than 1600 ISO

Summary: Feels like toy, is light and fast on focus i can say. For the money is fantastic.

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Overall

Cons: indecent build quality, inaccurate autofocus, image quality at f/1.8, unusable manual focus ring

Pros: Excellent image quality from f/2.8.Lightweight.

Summary: Good if you have a low budget, otherwise save your money for a better prime

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Cons: Trop plastique à mon gout (too plastic) AF lent et bruyant (AF slow and noisy)

Pros: Très léger (very light) Petit (Small) Images superbes (Beautifull pictures)

Summary: Un super 50mm, une super image, léger, il peut s'emporter partout, et pour les portraits, c'est impeccable ! A good 50mm, good picture, light, you can take it anywhere, and for the faces picture, it's perfect !

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Cons: slow focus

Pros: light weight, low cost, good optics

Summary: It is funny that many people expect lens to withstand falling to concrete ground. Which other lens you want to drop? Anyway, I found that it is extremely convenient to use it on T2i. I can put it in my coat pocket without carrying a bag. I just wish to have another one good value lens at 24 or 35mm

Build quality
Optical quality
Value for money
Overall

Cons: Plasticky build, noisy slow and imprecise autofocus, awful manual focus ring, a bit unsharp at the widest aperture.

Pros: Extremely cheap, extremely small and lightweight, very wide aperture, very sharp from f/2.8 on, very versatile focal lenght, cheap filter size.

Summary: A piece of equipment you can't miss! For a ridiculous price you get a 50mm lens which already at f/2.8 gives you very sharp pictures. At f/1.8 the sharpness is not amazing, but still acceptable. It's so small and lightweight you can easily carry it around in your pocket. A perfect travel lens to be paired with a multipurpose zoom for low-light situations. Focal lenght, although fixed, is a very useful and versatile one. Build is very cheap, but in my opinion it feels better than the typical 18-55 kit lenses. Pay attention to the focus, sometimes it engages the wrong target, especially when you use valutative exposure meter.

Build quality
Optical quality
Value for money
Overall

Cons: Toy plastics and construction. Noisy and imprecise AF. Unusable manual focus ring.

Pros: Better IQ than 50 1.4! Amazing at this price.

Summary: Best 50mm for little money. Unfortunatly, the build quality is a joke.

Build quality
Optical quality
Value for money
Overall

Cons: plastic

Pros: everything else

Summary: excellent chooice for amateurs!

Build quality
Optical quality
Value for money
Overall

Cons: Lousy auto focus. Flares.

Pros: Very sharp - produces great pictures, especially stepped down 2-3 stops. Very light. Low price.

Summary: It's my low light lens - almost never used with daylight, when it has flare issues. A wonderful lens for low light work. When possible, recommend to stop down to 2.2 or further - get's sharper. Beautiful shallow depth of field. On the other hand, if you need large depth of field - this one is not for you. 50 mm on 1.6 crop sensor gives 80 mm - perfect portrait lens. However, I seldom use auto focus - loud slow and lousy, mostly use manual focus.

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Overall

Cons: Build Quality - its all plastic! Focussing Ring is annoying, especially for video work.

Pros: Price - a bargain ANYWHERE Optical Quality - this is easily the best optical quality you will get for $100 - most other lenses of similar quality cost around $400-500! F-stop - again, amazing for the price you pay, creates great background blur which is brilliant for video work or portrait photography.

Summary: While I own the 18-55mm kit lens, which is a lot more practical (especially the 18mm wide side) I never use it, because it just looks rubbish compared to this lens. Low light video is also dazzling on the 550D, with the bokeh just looking brilliant. While you can buy better 50mm primes, they would set you back at least 4 to 5 times more. A great lens for a great price :D

Build quality
Optical quality
Value for money
Overall

Cons: - Poor Autofocus precision - Plastic casing

Pros: - Cheap price - satisfactory resolution and bokeh

Summary: For $85, it's amazing lens

Build quality
Optical quality
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Overall

Cons: Build quality... Manual focus is difficult..

Pros: Price, Sharpness, 1.8!, awesome low light capability, blurry bg. ok bokeh...

Summary: A must buy! A great portrait lens... Recommend 200%!

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Optical quality
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Overall

Cons: Plastic mount, manual focus hard with tiny ring

Pros: A gem of a lens in nearly all respects: great for low light wide-open, sharp, distortion free, decnt bokeh, light and perfect for portraits on 1:6 DSLRs.

Summary: Fabulous bargain, not worth the extra money for the 1.4

Build quality
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Cons: Completely made of plastic; significant frontfocus on my sample (3-4 cm); AF pulsing; very thin fous ring (hard to use even with small fingers)

Pros: Very nice in lowlight (1.8); sharp if focussed manually; small & light

Summary: Good value, fun to use, but who wants to use this focal length more often should consider other lens

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Cons: build quality is not the best .. + AF strikes sometimes ..

Pros: f1.8 - great sharpness (in combination with a EOS 450D great for portraits)

Summary: Amazing lens for the price of ~ 100€. Even if the build qualitiy is a bit too cheap for me I would buy it again and again , because if you are an amateur you can not afford at an L lens ;)

Build quality
Optical quality
Value for money
Overall

Cons: - The build quality is notorious. It cost my copy of this lens its life (and by that point it accumulated LOTS of dust beneath the front element, despite sporadic use). - 5 aperture blades produce "USSR quality mark" bokeh at wide apertures. - MF ring very poor, just a little better than that of a 18-55 kit zoom.

Pros: - Sharp when stopped down a bit. - Decent even wide open (on an APS-C body mind you). - Very compact and lightweight.

Summary: My lens was killed when it fell out of a backpack just 0.5 m above ground - a fall that both Tokina 12-24 and Sigma 15-30 have survived and continued to provide sharp pictures. But in the (exact) year that I had it, it helped me in low light situations a lot, or whenever I felt like bridging the focal length gap between my 17-35 and 70-200 lenses. It's the first choice for any Canon shooter on budget.

Build quality
Optical quality
Value for money
Overall

Cons: Build quality - plastic all around, except for lens of course. Narrow and not at all precise manual focusing ring.

Pros: Optical quality is superb. For lens that cost $100 you can't really ask for more.

Summary: Very good lens for it's price, just don't expect it to survive a fall on concrete from height over 1 inch ;)