Unable to change width of slider images (after certain width)

Hi there!

First of all, being a newbie, I’d like to say I’m extremely excited about using WordPress! It’s been very interesting so far and thanks to this community I have learned quite a crazy amount of things the past few days.

At the moment I’m having trouble with widening the slider images on a website. The name of the website is svlinkit.nl

I followed the theme instructions, searched everywhere for possible causes, and tried to change it in many ways. It doesn’t seem to be the image size or the margins. I was starting to think it might be because of the size of my computer screen, but surely that shouldn’t matter, because the home slogan does extend to the sides of my screen.

Could someone shed some light on this and help me out? I’m sorry if there’s any missing information. Thanks in advance!