Stop homepage banner from widening after a specific browser width is reached

Site URL: https://www.troop1916.com/

Hey there,

I have text in my banner which I cannot place as a text element. Unfortunately, when I increase the size of my browser tab (or if someone views the site on an ultrawide monitor), the banner image increases to a size where the text begins to cut off. You can replicate this issue by going to my site and dragging your browser width outwards -- you'll soon see the issue.

The "banner" itself was not uploaded to the page banner settings. It is a slideshow placed at the top of the page that turns into a banner slideshow with my theme.

Is there a way that I can stop the homepage banner from increasing width after the browser window has reached a certain width? 

Any help is appreciated. Thanks!