I would like to eventually get a quality lens that I could use with my digital and film pentax camera. What I have now is the kit lens 28-90mm and a 70-300mm Tamron lens along with several filters. I do quite a bit of landscape photography but also am trying to get into portrait type photography as well, given that I have a 6 week old daughter who is currently too young to object being photographed all the time. I would like a good "all around" lens that is multi-functional and multi-purpose. I am not by any means a 'professional' photgrapher who has a need for a dozen different lenses necessitating a lens for portraits, one for macros, a fisheye lens (for those 10 occasions that you would actually use it), etc. So what should I look for in a quality general purpose lens and how much should I expect to spend on a decent piece of glass. Specific models would be appreciated if any of you have a recommendation for the pentax line. Also I am wonder when trying to capture a sharp, crisp, focused picture with nice colors and contrast, how much of that can be attributed to the glass, as opposed to the setting? In other words, does the glass really 'make or break' the image? I mean, you could give a $6k lens to someone who knows nothing about photography and get a crappy picture, but a true professional could produce professional results with $100 lens if they had to. Thanks for looking and responding.