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 # Example 04: Retrieve Data from FFT MTF

 Last update: 09.03.2026 

Ex 4: A sample file (…\\Sequential\\Objectives\\Cooke 40 degree field.zos) is loaded and a new FFT MTF analysis window is opened. The maximum frequency and sampling is modified. Results are retrieved and the data series are plotted; the OpticStudio FFT MTF plot is recreated.

```
Input:      Sequential\Objectives\Cooke 40 degree field.zos

Output:     Graph (Matlab, Python)
            API\e04_pull_data_from_FFTMT.txt (C++, C#)

```

[C#](example_04_cs.md)

[C++](example_04_cpp.md)

[Mathematica](example_04_nb.md)

[Matlab](example_04_m.md)

[Python](example_04_py.md)