Very happy with my Tamron 100-400!
For me, the only con on a long lens is usually the weight, but this lens is surprisingly agile and I can even hand hold it for the most part, although I did add the tripod collar for those times a tripod or monopod is needed.
I had previously rented this lens and compared it with another popular one in the same focal length. This one has a small advantage on the largest f stop, plus I checked various reviews and settled on this one being the one I wanted, and could afford.
Very happy with my Tamron 100-400!
Verified purchase: YesCondition: New