Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Low quality if you are anything more than a hobbyist

I wanted to like this lens. The quality just wasn't up to par. Actually, it was pretty horrible. I am a professional just starting out, and thought I could cut corners and save a little cash with an off brand lens. However, after trying out the lens for one event, I had to return it due to it's very disappointing quality. Zoomed in, the pixels look muddled, and at times, the shadows look... choppy. I don't know the best way to explain it. If it helps at all, my camera is a Nikon D300s. I have never seen the type of results this lens produced from any other images/lenses.I've learned my lesson. I invested in a more expensive, Nikon lens. The quality problems have disappeared. Save your money or look else where if you are anything more than just a hobbyist.