En cherchant sur le net j'ai trouvé un test comparatif entre un 24-70mm f2.8II et un 50mm f1.8 STM à f.11 !

https://www.dpreview.com/forums/thread/3949718

"Conclusion: the 50mm STM provides additional IQ particularly at the edges and corners when compared to my 24-70 II @ 50mm. While it will not replace a Zeiss Otus that will eventually make its way into my bag, for $110, it's a great interim deal. In fact, price and it not sucking wide open is why I gave it 3.5 stars (I never give 5 stars to anything because I have yet to see a perfect massed-produced consumer product). It gets a ding for not being better against the 24-70 II than it is."

Encore une copie qui avait un pb ...