Gene51 wrote:
After using (for a week back in 2016) a borrowed C, I found it almost as good as a Nikkor 200-500, but no match for the Sigma Sport version which I ended up buying. The Tamron G2 came out after I purchased my Sigma, and based on a borrowed copy, I can say without hesitation, the image quality is equal to the Sigma at 600mm, and slightly better at shorter focal lengths. The build quality is adequate, compared to the tank-like build of the Sigma, but it does make it 2 lbs lighter and it is adequate. Weather sealing is similar. So if you want to pull the trigger, you will likely pick up another 20% improvement in overall image quality. This is purely anecdotal, and your mileage may differ, but the G2 will be a noticeable improvement over the C. You didn't mention what camera you are using. If you have a full frame and at least 36 mp, you will see more of a difference than if you have a crop camera and just 20 mp. You'll see even more improvement if you have a 45 mp camera.
After using (for a week back in 2016) a borrowed C... (
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