Body: D70S (without Kit) Lens: all Nikkors 50mm f/1.8 75-300 f/4.5-5.6 I'm looking for my next lens, which has to be on the wide angle side, since I cannot work indoors and do studio shooting with these two lenses that I have right now. I'm going to sell the 75-300 to get some money to buy the new lens. First of all let me tell you that I'm from Uruguay, South America. I can only buy stuff in USA whenever somebody that I know is traveling there, so he/she can bring it back to me. I cannot ship stuff to my house because customs charge me 80% over the cost and s&h, and the "gift" trick doesn't work. Talking about money, the Nikkor 18-200 VR is totally out of contest, it's way to expensive for me. There's a mate that has another D70S and a 18-70, so I already know how this lens performs. I've read many things about the Sigma 18-125 and 18-200 and I'm a little bit confused. 18-70 vs 18-125 - I know the Nikkor has a faster AF, but I would like to know how slow is the Sigma, can it be compared to the 50mm's speed? - Which one gives sharper images? - Which one gives better colours? - I don't want to sacrifice image quality for having just a little bit more range. - I don't care about focusing noise. - some say that some of them have a focus problem, you can either get a good sample or a bad one. - some say that the bad samples are just the ones for Canon, what about the ones for Nikon? 200 better than 125: Some people say that it's better, but... - I've seen some photographs with more CA. - It's softer. - More on the tele side, but some say that it's really a 155mm - More expensive In case I'm getting the lens over here, the 18-200 is discarded due to its high price (200 US$ more), but if I can get somebody to bring it to me from USA, I'm going to take it into consideration. Prices here Nikkor 18-70 - 400 US$ Sigma 18-125 - 400 US$ Sigma 18-200 - 600 US$ Any help and comments are more than welcome.