DxOMark published their review and test results of the Sony FE 100-400mm f/4.5-5.6 GM OSS lens which is Sony’s longest lens in the lineup. Tested on the Sony a7RII, the Sony FE 100-400mm f/4.5-5.6 GM OSS achieves an outstanding overall score of 29 points, with a combination of 36 P-Mpix Sharpness, 5.9 TStop Transmission, 0.4% Distortion, -0.8 EV Vignetting and 5μm Chr.aberration.
DxOMark said the Sony FE 100-400mm GM has very high levels of sharpness, low fringing and vignetting and it is the Sharpest Telephoto Zoom Lens!
Conclusion from DxOMark:
Telephoto zoom lenses like this tend to be quite large and unwieldy, and are inclined to be sharper at the shorter end of the zoom range. They also often have troublesome chromatic aberration that contributes to the decline in image quality, particularly at the longer end (where you need it the most).
While there has been some slightly improved performance in more recent models, such as the Canon EF 100-400mm 4.5-5.6L IS II, Sony’s new FE 100-400mm F4.5-5.6 GM OSS stands out not only for its seismic shift in sharpness, but also for being not much different in size to the FE 70-200mm F2.8. Best of all, perhaps, is that for once there’s a tele-zoom that offers seriously impressive image quality at that prized 400mm focal length. Read the full review
Read more: Best Sony Full Frame E Mount Lenses.