Instruct: Classify Amazon reviews into positive or negative sentiment
Query: NOISY. Slow.

Pros: CHEAP... f/1.8 is great for bokeh/depth of field effects.Cons: Don't expect to shoot anything quietly, or quickly with this lens. The autofocus is nearly useless. It is so slow, noisy, and at times inaccurate that you're better off keeping it on manual. Also, 50mm on a cropped sensor is really an 85mm lens, putting you uncomfortably close to friends and other subjects.Personally, I think this is a waste of money. I purchased the Sigma 30mm f/1.4 EX DC HSM Lens for Canon Digital SLR Cameras for $450 or so and it has been worth every penny. It provides a wide enough angle, with a super-wide aperture, and a fast focusing motor.