08-26-2015, 12:51 AM
The 24/1.4A suffers a much worse field curvature situation than the 24L II. Or rather, the astigmatism of the 24L II is much better tamed.
http://www.the-digital-picture.com/Revie...p=5&CT=AVG
24L II has 3rd and 5th order curvatures balancing each other, 24A has an exquisite sagittal plane and either a badly curved tangential one, or much worse lateral color.
Corner issues in MTF tests are not exclusively to do with field curvatures, there are many field-dependent aberrations that contribute.
http://www.the-digital-picture.com/Revie...p=5&CT=AVG
24L II has 3rd and 5th order curvatures balancing each other, 24A has an exquisite sagittal plane and either a badly curved tangential one, or much worse lateral color.
Corner issues in MTF tests are not exclusively to do with field curvatures, there are many field-dependent aberrations that contribute.