Thanks for your reply.
Regarding " at this time, I see nothing when rendering your code in a desktop browser."
Do you mean you see “nothing” or you don’t see the image problem?
As stated “image is viewed full screen it looks fine”, which by that I mean ‘desktop’. It’s the mobile view that changes the image to disproportionatly too small.
The code you posted doesn’t exhbit the problem you are trying to show us. It shows the full size image at all times.
As Ray said above the rules that resize the image (or its container) are not present so we can’t see how you are making it smaller.
l’m guessing a simple min-width on the image would do the trick but if the container is being sized in percentages and the image width is 100% then the container needs the min-width instead but of course this could break other columns. Without seeing the structure you have its hard to give a useful answer