I just "checked" your profile (sorry for this word!).
Are you a SIGMA DSLR-newcomer .... or do you have some experience with SIGMA cameras?! It would be nice to know more about you?!
As far as I am concerned, .... I tripped over SIGMA in 2005. In those days, I had always dreamed of a digital SLR-cam.
In fact, the SIGMA SD10 then was the first D-SLR that (sold off!) was cheapest on the market. I then got it it with (your!) 18-50 DC KIT-lens.
Actually, I have never thought this lens to be low quality .... if anything ... I often use it with my SD9 on bicycle tours.
Well, ... my SIGMA story ... to be continued.
After some severe SD10 disappointments ... which is the usual thing when using the cam first ... some burning ambition hit me with this "sophisticated" cam.
After some weeks of training, I step by step became absolutely fascinaded of this camera ... colours, resolution, the three-dimensional look of its pictures were really finest!
See you with nice pictures