QUOTE(Smilefaceeee @ Jul 22 2014, 07:32 AM)
dear all sifus, wanna ask ur suggestions...should I sell of my canon 40mm f2.8 and buy a sigma 17-50 f2.8? coz it covers the range already..I just bought I less than a month... =( got anyone interested boh this pancake lens??
I don't own both the lens so but i can only suggest you consider based on what you want to do with it.
Prime lenses generally gives higher quality picture in being
crisp and sharp. Since it is a pancake lens it is
light too.
Zoom lens give you
flexibility in range and since it is fast at 2.8 definitely a go go, normally prime will give better quality pics but nowadays tech has improved and i believe it will give you pics that are just as good.
In terms of quality of picture , you can go compare web reviews side by side comparison. But i believe it is only when you zoom into the details then you see the difference or such as Chromatic abberation and vignette and etc.
In Conclusion, for myself i would prefer zoom lens and even if the quality lacks a bit in terms of CA, Vignetting and sharpness.
Happy deciding.