Sony 50-150mm f2 vs Tamron 35-150mm f2-2.8: A Lens Comparison

I've been a long time owner of the Tamron 35-150mm f2-2.8 lens. And before I even dive into this comparison I'll be flat our honest with you. The Sony 50-150mm f2 is a very good lens -- but it is absolutely nowhere as useful. I, like so many other working photographers, would prefer to have the zoom range instead of the constant aperture. In situations where the aperture changes, you can use a higher ISO setting or TTL flash. So during my review period with the Sony 50-150mm f2, I compared it to...