The zoom functionality on Product Image Gallery works fine on Desktop/Laptop but its horrible for Mobile devices. You have to pinch & zoom and it makes the images entirely blur. I have tried a gazillion resolution and ppi combinations in photoshop but nothing works.
What can be a possible workaround?
If you or anyone else still needs help with this, you may be interested in checking out this tutorial for a copy/paste code snippet which enables a "click to zoom" feature for Debut.
Here is a live demo of how it looks like.
If you need any help feel free to reach out and I'll be happy to assist.