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Lack of sharpness at f1.8 on Canon 50mm STM

Started 4 months ago | Discussions thread
John Sheehy Forum Pro • Posts: 26,698
Re: Lack of sharpness at f1.8 on Canon 50mm STM

Chris R-UK wrote:

This isn't an unusual behaviour for a lens of this type. Even better quality lenses don't normally reach their sharpest point until 2-3 stops wide open. Reserve f/1.8 for when you really need it and then put up with the lower sharpness. Otherwise, shoot at narrower apertures. If you want a lens that is significantly sharper at f/1.8, then you are going to have to spend a lot more money for something like the Sigma Art 50mm f/1.4.

There are actually cases where maximal sharpness wide open can be counter-productive, and lenses like this are preferred, like when shooting line-skipping video modes, where a soft lens like this allows shallow DOF without the egregious aliasing that can occur with sharp lenses and line-skipping video.

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Beware of correct answers to wrong questions.
John
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