A good test is to defocus just a bit and see if the image is nice and round or egg-shaped.

一个好的测试方法是虚焦一点点，看图像是不是圆形或者是蛋型的。

youdao

A good test is to defocus just a bit and see if the image is nice and round or egg-shaped.

一个好的测试方法是虚焦一点点，看图像是不是圆形或者是蛋型的。

youdao