Raycus 50W red laser

I have a 50W Raycus fiber marking and i noticed that when the red laser is showing the engraving area it goes out of focus in relation to or focus of the fiber laser. For example: if I use a 110x110mm f-theta, the red laser focus is around 12mm above the fiber laser focus, which makes the red line thicker. I don’t know how to solve because unlike the 30W, the Raycus 50W comes with the red laser inside the sourcer.

After changing the field lens, you need to adjust the focus position, and also adjust the position of the red dot pointer