sigma 17-50 vs nikon 18-55?

[bechdan]

does anybody have advice on how these two compare?
the nikon is £60 and sigma is £320
is the difference in IQ worth it?

Ive currently got the sigma 10-20 nikon 40 micro, 18-55 and 55-200 mostly interested in landscape and macro

 

[pedroj]

I think the Sigma is an F2.8 compared to Nikons kit lens which is F3.5 to F5.6..I am sure both lens are very capable of producing excellent images at their sweet spots

 

[bechdan]

yes i know the specs, I was just wondering if anybody had experience of both?