Well I wont post you any of my Tamron 150-600 shots because they all came out very blurd.
Of I went with my wife and her $50 400 mm 5.6 Tokina on a D7100 and me with me tamron and a D810 ...All tested and fine focus adjusted...French bird reserve in the somme estuary ...15 bird hides in the salt marsh click click click and who got the good shots ???
She did all in focus and I got 700 all fury....reason that UV filter I just fitted ...would not focus from -20 to +20 ..take it off ..perfection.
Any body else had this problem ??? Cannot see any problem when I look through it......