Canon Community

I have seen a lot of people use Tamron and Sigma lenses and always wanted to know how they compare to a Canon lens, specifically in the 600-800mm range?  I want the best quality pictures possible, but will I be disappointed with a non-Canon lens?  I ...

I just got the 5DSR last week.  I had been using a 70D previously until it broke and then a Nikon 800D for a little while.  I was excited when I got the new camera.  I really love it, but am a little disappointed with the clarity of the pictures.  I ...