Hi everyone,
Do you have an idea on why the sagittal and tangential MTF values are far by this much as shown below?
Some details about the System: Off-axis mirror set, curved mirrors involved.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/cb86654a-83a3-47cc-ad24-86b07360af87.png)
Yellow arrow: tangential
Looking forward
Best answer by yuan.chen
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