Decent lens, but there's 2 versions it looks like.
4 December 2013
Summary: The lens offered appears to have changed alittle. When I bought it back on 3/13 there was no autofocus motor in the lens and was listed as model number A15. Now a new picture appears clearly showing an autofocus motor and the model listed as (A15N). Amazon should probably update the listing description as it still leads the customer to believe there is no autofocus motor. All in all it's a decent cheap lens that will give you alittle more reach than the basic kit lens.
Summary: I was kind of nervous to buy this lens and worry that it might not be as good as some users had claimed. As soon as it showed up on my doorstep, I opened it up and put it on my Nikon D50. LOVE this lens! Would order again!
Summary: Basically, this is an old lens from Tamron. So it doesn't have built-in motor inside of the lens. Thus, most today's Newer modern dslr won't compatiable(such as D5100, 3100 etc. If you're on to this camera then get the AF-S or something has to do with built in motor otherwise it stated. I just got this lens for myself for use with fujifilm s1pro.