DxOMark has completed their review of the Sony 70-200mm f/2.8 G Master and the lens earned an "Outstanding" rating with a score that made it the "sharpest and best low-light lens we've tested for the Sony α7R II". Paul Carroll of DxOMark highlighted the low-light performance and phenomenal sharpness as key factors in the 70-200mm being the top-performing zoom that DxOMark has tested on the Sony α7R II.

"In terms of the Sony FE 70-200mm f/2.8, it’s not only the sharpest and best low-light zoom lens we’ve tested for the α7R II, it also outperforms many FE-mount prime lens options, ranking as the fourth-sharpest lens we’ve tested on the α7R II. Resolution at f/2.8 is first-class between 100 and 200mm, and peak sharpness of over 80% acutance in the field occurs between f/4 and f/8 for phenomenally sharp results on the α7R II."

And compared to similar Canon and Nikon models, the 70-200mm f/2.8 G Master also won handily. "If we compare the Sony FE 70-200mm f/2.8 to the equivalent Nikon and Canon f/2.8 telephoto zooms tested on their respective highest-resolution DSLRs, we see that the Sony comes out top for low-light performance, light transmission, and sharpness."

And...

"In fact, it’s significantly ahead overall for sharpness, not only producing the greatest sharpness at 38 P-M pix, but also realizing a significantly higher percentage (90%)of the camera’s sensor resolution."

And...

"In terms of the Sony FE 70-200mm f/2.8, it’s not only the sharpest and best low-light zoom lens we’ve tested for the α7R II, it also outperforms many FE-mount prime lens options, ranking as the fourth-sharpest lens we’ve tested on the α7R II. Resolution at f/2.8 is first-class between 100 and 200mm, and peak sharpness of over 80% acutance in the field occurs between f/4 and f/8 for phenomenally sharp results on the α7R II." - Paul Carroll, DxOMark