Lenses

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Cons: Heavy, expensive, not so good against bright light,

Pros: Solid as a rock, fast and acurate AF, very good imagequality...

Summary: An amazing Lens for Portraits, Events, Studioshootings and every kind of weatherconditions.

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Overall

Cons: not much worng except no vr

Pros: great for moving photos, or low light, excellent IQ

Summary: I love it

Build quality
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Overall

Cons: It's a pro-level DX lens! With pro's and advanced amateurs now favoring FX format or at least contemplating a switch to FX in the future, spending that much for a DX lens is a tough decision.

Pros: It's a pro-level DX lens, that can be bought second-hand for a very attractive price (about 700-800€)

Summary: An excellent choice for an advanced amateur/pro who does not envisage to go full-frame any time soon; second-hand price is very competitive with lesser-quality lenses.

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Cons: - by a group portrait at 17mm f5.6-f8 in the middle are the persons sharp and on 2/3 are persons not sharp.. a little disappointing (for the price). - big - price (but it's worth!!)

Pros: - heavy build for all circumstances - F2.8 at 17 to 55mm

Summary: Bought it new and it's my prime lens.. most circumstances works very fine for me. Except with group photos.. pity because it's a very expensive lens.

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Overall

Cons: super fast lens

Pros: weight

Summary: great lens

Build quality
Optical quality
Value for money
Overall

Cons: Very expensive, not perfect for landscape, maximum sharpness F4-F5.6, F8-11 is worse than 16-85 for instance, cannot be used hyperfocal focusing (asymetric DOF - shorter DOF behind focal plane) no VR, very high lens flare, old lens firmware without newest possibilities for service corrections.

Pros: Perfect build, perfect indoor reportage lens, very fast and precise autofocus, fully usable at F2.8, low vignetting, light nice colors, sharp at large apertures from 17mm to 50mm (55mm slightly worse), perfect exposure with flash.

Summary: The best indoor reportage lens for DX in its focal range.

Build quality
Optical quality
Value for money
Overall

Cons: Zoomring is a bit crappy to use, it's to small and to close to the body and also on new ones in store a bit stiff.

Pros: Fast and accurate AF, 2.8 on the whole range, apart from the zoomring, the buildquality is amazing

Summary: I bought mine second hand, with very stiff zoom ring and you could see it was used The new price is very high, I wouldn't have considered buying it if I had to buy it new Image quality is very good, but not much better then Nikon 18-70mm

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Overall

Cons: Premium price compared to competitors (Tamron 17-50 f2.8, Sigma 18-50 f2.8, Tokina 16-50 f2.8).

Pros: Beautiful pro quality build that inspires confidence, lasts a life time. Better bokeh than all the 3rd parties. Fast, silent and accurate AF.

Summary: Yes, you can save pennies by buying the 3rd parties as the Nikon version is 3 times more expensive but not necessary 3 times better in terms of performance. But it is just like buying a watch, you can buy a Rolex (collector piece), or buy a cheap Timex (practical use). It's your money.

Build quality
Optical quality
Value for money
Overall

Cons: Placement of zoom ring, plastic filter mount, breathes air, severe flare and ghosting.

Pros: Sharp, solid build quality, rain proof, reasonable level of distortions.

Summary: I bought this lens second hand to replace my Sigma 17-70 HSM. Thus I'm not sure if it's the previous owner or the design that makes the zoom action so stiff. The zoomring is inconveniently placed for a D300 plus battery grip. My new Nikon 24-70 is much better in this respect. It's a good performer all in all though. The sun hood design is excellent. If you need a light (similair stuff on a D3 is even bigger and heavier) but good kit this lens in combination with a D300s is just about the best you can get. Although I would not suggest this lens to someone who is planning on upgrading to FX at some point anyway.

Build quality
Optical quality
Value for money
Overall

Cons: Price.

Pros: There are no cheaper competitor's lenses of that class that would deliver better performance. This lens is fully usable @f/2.8. AF gets enought light to perform well on dimm light, which makes it perfect choice for shooting wedding and other church ocassions. Sharp, nice natural colors.

Summary: It is big and heavy. It might be a cons for somebody, but it makes a perfect set with my D300. As most of pro-grade lenses it is a bit too expensive but I can not complain on its build and image quality. Oh btw, zoom and focus rings are swapped :-)