I recently bought a Pentax K-r that is on its way. I am a total DSLR newbie and have no idea what I am doing. I've read a lot and done some research though and I think I, for now, would really like having just one single lens on my camera for days out and things where I don't want to carry a ton of stuff with me. Can anyone give me an opinion on if this would be good for that? http://www.amazon.com/Tamron-AF-18-...1?ie=UTF8&s=electronics&qid=1306608525&sr=1-1 It seems to have OK reviews. I really have NO clue when it comes to lenses (and until recently had no clue when it came to cameras either but I think I've learned some in the past week or so... SOME... not everything. ) . Anyway any input would be appreciate. Keep in mind I want something fairly easy, "all in one" until I learn what I'm doing and learn how to take pictures. It will probably be on auto a lot to start with but I would ultimately learn how to take pics in manual mode as well. Eventually I think I will also probably get more lenses, but for now I am just looking for one that I can leave on there all day and not have to switch around. Thank you!