I just purchased a Pentax ist DS after my Nikon FE was deemed
unrepairable. I bought the kit which came with the 18-55mm lens. It has been years since I've been in the hobby field and feel that I must reeducate myself with the basics (which I've been doing through classes and books). I would like to purchase another lens to add to my kit. I enjoy taking pictures of animals and nature. There are so many brand names and types that I don't know what would be best to buy. I was looking at the Tamron AF18-200mm. I don't know if this would even work on my camera or if someone can suggesnt a better choice for me to look into. I'd like to keep the price below $300.