Hi chrishelp,
here’s a ticket in github:
https://github.com/Themekraft/Custom-Community/issues/78
since it is responsive, the slideshow image is adapted to fit to the screen.
we will think about an option to make this work normal = then just the given image size will be taken.
for now, if you check your image size and it is 912 x 250, then the images should look nice on big displays, with responsive mode on.
there will come a better fix, but for now, this image size should work.
hope this helps,
konrad