Hi,

Increasing the Field of View of a system can be a tricky problem:

I would suggest slowly increasing the FOV by hand and runing optimization step by step.

For example, here is what you get when you go from 14 to 20 degrees maximum field, more aberration and vigneting!

Best,

In term of operands, we have those:

Finally, you can now put variable directly in the Field Data Editor to optimize diretly on them!

Thomas is absolutely right in the method he gives, and you can make the FOV variable simply by making it so in the editor. But, I am not sure how well this will work in practice. With any image quality criterion merit function, a smaller FOV will always give better performance than a larger FOV. In other words, the FOV never truly 'optimizes', in the sense of going through a turning point where the gradient of the MF with respect to FOV changes sign. It's usually much better to set the FOV to a value set by the geometric construction of your object, and then optimize the system for that FOV.

BTW, something that may be more useful for you is to use a Universal Plot to plot whatever parameter is of interest versus field of view.