I know you guys hate gear threads but I am looking for a zoom lens for my Pentax K200D to take on vacation (only have the kit lens) and I do not know what I should be looking for.What do you think of these lenses?Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens - $133http://www.amazon.com/exec/obidos/tg/detail/-/B000B8T6E2Pentax DA 50-200mm f/4-5.6 ED Lens - $180http://www.amazon.com/Pentax-50-200mm-4-5-6-Samsung-Cameras/dp/B0009OAFI4Pentax DA 18-250mm f/3.5-6.3 ED AL IF Lens - $440http://www.amazon.com/exec/obidos/tg/detail/-/B000WJOF1OI think I want to get the Sigma or the cheaper Pentax, but why is the Sigma cheaper than the Pentax? Is it really shitty?Comment too long. Clickhereto view the full text.
Also what is the difference between that Sigma 70-300 and this Sigma 70-300 that costs $205?Sigma 70-300mm f/4-5.6 DG APO Macro Telephoto Zoom Lenshttp://www.amazon.com/Sigma-70-300mm-Telephoto-Samsung-Cameras/dp/B000ANGXW6
>>209103A couple elements are made of apochromatic glass in the APO version, thus the image quality is supposed to be slightly higher. Everything else is basically the same.
>>209107Thank you for the information!I was not sure what the APO stood for.Do you know of any comparison shots from the two?
>>209115Apochromatic. If I remember correctly, it means it has a 3-element achromatic lens designed to correct 3 main wavelengths of light, or something to that effect. More effective than a 2-element achromatic.