I like the zoomrange 18-55 but my kitlens (pentax) isn´t that great to be honest. Allthough i was thinking on the sigma 18-50..it dosnt cost much but maby its sharper and have better quality feeling all over it?. Does anyone know something about this lens? ( sigma 18-50 ). Have a nice day!
The Pentax "kit" lens is one of the better cheap standard zooms around (unless yours has a problem). The Sigma you mention would probably be a small step down in quality. The Sigma 18-50mm f/2.8 EX DC Macro is available in Pentax mount and it is a very good value.