I was a little bit concerned with the quality of the 600mm images. I know that things are reduced and sometimes images are distorted by reduction and jpeg, but I feel that my 100-400L with a 1.4X TC looks as good or better on my 5D MK III with a 100% crop.
The comment about AF stopping at times was a bit concerning as well.
Like others, I'd like to have a low cost 600mm lens, and I know there will be compromises, I want to better understand what they are.
Frank - Did you try a TC on the lens with the 5D MK III?
bad news , kenko DGX pro 300 blue dot (newest one) was not working either 1.4x or 2x , error 01
maybe old non report model will work (or tape mod)
but working on 600D , exif are not correct ( while i using with canon 70 200 2.8II it show F4 with 1.4 and 5.6 with 2x) but on tamron 150 600 it only show value without VC
i need to return lens within a few hours, it is 3:30 am hong kong now, i will online tomorrow ~
fixed the server , finish the review and now i finally can get a sleep HAHA~