header images zooms in on mobile devices

Hi, I cropped all my featured images as suggested header image size,
on mobile devices (I tested on Samsung s6) the image zooms in. and on some featured images I get bad results, its just a small part of the header zoomed in and cropped to screen size.
I tried instead of “cover” using “contain” for the image size. But then long header text is not readable, picture zooms out on small devices.
you can check it on this link:
http://helpghana.info.greenhostpreview.nl/portfolio/meubilair-en-boeken-voor-de-nkwabeng-dayak-memorial-junior-secondary-school/

thanks
B

Hi,

Background image sizes are pretty tricky to play around, You can play around with this values,

#header {
    background-position: center center;
    background-size: cover;
}

Ref:

Let us know,

Thanks,
laranz.