I been following this thread since it started and good to see different opinions. Tamron 150-600MM is a good lens with pro's & con's.. I currently own Tamron 70-300MM VC USD and it's not a super telephoto but does decent job by it's price.
I am more into wildlife photography (specially bird) and looking for a large Telephoto lens with very good IQ and off course like many i refuse to pay 10000 USD for a lens.. (This money is still mean a lot to me so want to spend wisely.) So keeping budget in mind Tamron 150-600MM is a great option but i always wanted Canon 400MM F5.6L prime.. I know Canon is 400MM & Tamron reaches upto 600MM but my greater need is better IQ.
Recently i was going through this review and this is making my mind switch to Canon.
This review clearly saying Canon is still better after cropping equivalent to 600MM of Tamron.
Now the big question is to those who have or used both the lens (Tamron 150-600MM & Canon 400MM F5.6L), which one is Sharper & better IQ?
(I can't try both the lens and choose a one nor has rental facility in my location.) My friend has Canon 100-400MM L and i would go to Tamron rather than canon 100-400MM L.
Btw i own a basic T3i body and might not upgrade in another 6 months..