Featured slider image issue

I have had reports that the Featured Slider image is cropping part of the right hand side of the photo when the site is viewed on a 15.6" laptop running windows and IE11. I've checked the site using developer tools emulations on all devices and sizes available, and everything looked ok. So surprised now that the slider image doesn't display properly on some laptops. I knew there would be a white area if displayed on a 19" screen but just left this for now. Can you help identify why slider is displaying incorrectly on some IE11 browsers please. my site is www.bsab.co.uk