Canon EF 50mm f/1.4 - At what aperture is it sharpest?

[Ulriksen]

As the title says; at what aperture would you say the Canon EF 50mm f/1.4 USM ​lens is sharpest?

 

[MTVision]

Probably around 2.8 - 5.6

 

[Ulriksen]

Thanks

 

[Derrel]

As the title says; at what aperture would you say the Canon EF 50mm f/1.4 USM ​lens is sharpest?

According to this test,Canon EF 50mm f/1.4 USM - Review / Test Report - Analysis its best aperture is f/5.6. f/4 is good too, and close. F/8 is also good.

A full-frame camera test here Canon EF 50mm f/1.4 USM - Full Format Review / Lab Test Report - Analysis shows the same results....f/5.6 best, with f/4 and f/8 also very close, and very good.

 

[Big Mike]

It's a good bet that F8 is going to be near the sweet spot of most lenses.
Many people will also say that the sweet spot starts at about 1 or two stops down from wide open.

So, F4 to F5.6 would be my guess for this lens...and it sounds like the tests will prove that.

 

[Hardrock]

Mine is very sharp from f2.8 to f11 but I don't hesitate to use it wide open it will produce a dreamy feel and is still consideribly sharp but will introduce some CA.