Reply To: Choosing between sony or sigma lens for wildlife

[Sudipta Sinha]

I always prefer the manufacturer’s lens rather than a third-party lens. It has certain advantages technically. The compatibility with firmware updates is easy to handle. Sony 200-600 is a superb lens; I have used it (not mine, but from my friend). It is awesome. The Tamron 150-600 is good also (again, I used my friend’s gear). However, it suffers from chromatic aberration.
As you plan to update your body to A9, I recommend Sony Lens, which is not too expensive. However, the budget is yours. So you may want to save some money with Tamron. But the difference between them is not too much. Either way, you can capture great shots. Good luck.