Currently im disappointed with my tamron 28-200 as the sharpness isnt there.
I've listed out 3 possible lens which im considering.
1. Sigma 70-300 macro
2. canon 75-300 USM
3. canon 55-250 IS
Which is the sharpest of all? Be it macro, usm or is, it doesnt matter. What matters more is the sharpness. I will cover the wider end with tamron 17-50 f2.8.