I wonder if this lenses will work with Canon T3i. The compatibility match on Amazon.com says they may not work but I know very little about the subject.
We have an existing question that already answers this. Take a look at:
The above will tell you that the "Di" in the product name indicates that it works with full frame cameras.
Further, we have questions that address full frame vs crop sensor(APS-C in this case) sensors, such as:
- What is the difference between EF and EF-S lenses?
- Is it a wise-decision to buy full-frame lenses for use on an APS-C body?
- When do the differences between APS-C and full frame sensors matter, and why?
To sum it up, your camera is an APS-C Crop Sensor Camera. It will work with both full frame(EF) and crop sensor(EF-S) lenses. Tamron refers to full frame lenses as Di, thus it will work with both full frame and crop sensor cameras. The lens will certainly work with your camera.