Gallery of Photographs with Different Orientations

Hello everyone, I am needing a little design help with the Slider function.

I’m trying to make a gallery of images for a photo studio website I’m designing where we take both portrait and landscape style photographs for visitors. Our typical aspect ratio is either 4:3 or 3:4. I want to be able to keep the crop of the photos as close to the original as possible but when I go from Desktop to Mobile versions the auto-cropping and positioning ruin the photos. Does anyone have any ideas for help?

Here is my site Read-Only:

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