There are several incorrections in the review. For example sharpness (P-Mpix) score is confused with overall DXomark Score.
Attached to the APS-C sensored EOS 7D, the EF300mm f/2.8L IS USM once again puts in a strong performance, scoring 16.7P-Mpix, relative to the EOS 7D’s resolution of 18megapixels. Equally, the Pentax lens scores very well, managing 15.0P-Mpix compared to the 16.3megapixels available on the K-5. Overall, this shows the EF300mm f/2.8L IS USM is as good as it’s made out to be, but in this comparison, the Pentax on a K-5 is not that far behind.
EF300mm f/2.8L IS USM + 7D =11P-Mpix not 16.7P-Mpix as mentioned.
DA Star 300mm f/4 ED (IF) SDM + Pentax K-5=only 7P-Mpix not 15.