The images are currently being displayed with a background copy of the photo that is larger and darker.
To remedy this (at least on a Windows PC)……you can LEFT CLICK on the black areas to the left and right of the photo itself. This will remove the darkened background image.
Another method is to RIGHT CLICK on the photo itself and choose “Open in New Tab”. This will give you all the resolution the image has to offer.
MAC/Apple users might have a different process?