Considering buying a Sigma 17-70 Contemporary, but how much better is it than my 18-140?

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Cingen
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Considering buying a Sigma 17-70 Contemporary, but how much better is it than my 18-140?
2 months ago

Hey all!

I am considering buying a Sigma 17-70 2.8-4 Contemporary lens for my Nikon D7100, but I was wondering about how much better quality it delivers compared to my Nikkor 18-140 lens.

I am currently doubting between buying a Tokina 11-16 or this Sigma lens. I will surely buy both down the line, but for the moment I am clueless which I should go for first.

I am currently unhappy with both the sharpness and colors delivered by the 18-140 kit lens, it simply cannot satisfy me. I know the Sigma is an improvement, but how big of an improvement is it really? Is it just a small one or is it an obvious difference?

If the difference is obvious I will most likely buy the Sigma first, but if the improvement is only a small one I will buy the Tokina for my upcomming trekking trip in Scotland in 2015.

Thanks in advance for your feedback!

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