Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some one has to be different.

Nice, sharp, bright, fast. But the darned thing focuses slightly in front of the subject.I was using the AF to get close and then switching to manual focus to fine tune, but then I decided, hey, why am I doing this for $360? Its not my imagination. I ran a test with a tripod and three focus cards on sticks. Very disappointed.I assume you can adjust it, but that should be the manufacturer's job.Thanks be to Amazon, they accepted a return at less than 30 days and gave me a refund.Canon should hire Amazon's Customer Service Manager. You have to like Amazon. Canon Customer Tech Support actually told me that I had to be wrong. Blame the victim.Amazon is, I think, the best customer service and support organization out there.BTW, I now have my second Tamron lens. Top quality performance and a six (6) year warranty. With Piezo drive their technology is ahead of the prime manufacturers.