Dao
No longer a newbie, moving up!
As I said. This is a $5xx lens. In this price range, people usually choose between the 70-200mm F/4L and 70-300mm F4-5.6 IS.
If you know how to this both lenses, you will have great result.
Check out this link too, there are a lot of other users comment on this lens
Canon EF 70-300mm f/4-5.6 IS USM - Canon Digital Photography Forums
Take a look at this image
Wolf On The Run photo - Guy Schmickle photos at pbase.com
Again, Optically, the 70-200mm F/4L is better, no doubt. But this lens is very close. Research more and pick your choice.
If you know how to this both lenses, you will have great result.
Check out this link too, there are a lot of other users comment on this lens
Canon EF 70-300mm f/4-5.6 IS USM - Canon Digital Photography Forums
Take a look at this image
Wolf On The Run photo - Guy Schmickle photos at pbase.com
Again, Optically, the 70-200mm F/4L is better, no doubt. But this lens is very close. Research more and pick your choice.