[somozasayre]

I have a K100D Super and the standard 18-55mm f/3.5-5.6 lens it was bundled with. I did some lite reading and I think I'm ready to start buying some more stuff. I found this 28-105mm f/3.2-4.5 lens
http://www.adorama.com/PX28105AFN.html#ProductReviews
that looks like a great replacement, but how much macro ability would I lose from the 18mm to the 28mm jump? And how much would I gain from the 55mm to 105mm jump? (I'm guessing double? )


oh and are all filters basically the same or do the more expensive filters work better even if it's only UV? Last question! should I buy a big filter and an adapator in case I get a bigger lens them 58mm in the future?