Buying a new lens, not sure which one.

[carman]

I have a Pentax k100d, and I am looking to buy my first lens, I currently have an 18-55mm SMC Pentax DA lens, but i'm looking for a cheap zoom lens. My budget is pretty low, its $199.99 before taxes. Their are a few lenses in this price range and I want to know which one is better, and work buying for an "entry zoom lens". I know i'm not going to get an amazing lens for this price, but I want an enry lens, in the future I will spend more. The choices are:

TAMRON 80-210MM/4.5-5.6 PENTAX AF

SIGMA 70-300MM F4-5.6 DG MACRO PENTAX (this was my original choice)

PENTAX DA 50-200MM F4-5.6 ED LENS BLACK

SIGMA 55-200MM F4.0-5.6 DC PENTAX W/HOOD

[TheWengler]

Look at the Sigma 70-300 APO or the Tamron 70-300. I'm not sure why you included the Sigma 18-50 f/3.5-5.6, it's just another kit lens. Also, the term "zoom" refers to the ability to change focal lengths. "Telephoto" refers to longer focal lengths. So, what you're looking for is a telephoto zoom lens.

[carman]

Look at the Sigma 70-300 APO or the Tamron 70-300. I'm not sure why you included the Sigma 18-50 f/3.5-5.6, it's just another kit lens. Also, the term "zoom" refers to the ability to change focal lengths. "Telephoto" refers to longer focal lengths. So, what you're looking for is a telephoto zoom lens.

Yea I didn't mean to add that one. That was a mistake.