Wordpress Center photo in Fast Gallery without cuts

I have on my site Fast Gallery on popup in essential grid and i have one small problem. When i open portfolio item, there is fast gallery Fotorama slider and photos are cut off a little. I tried i think everything but i don't know how to fix that. Can someone help? Here is my site: http://ift.tt/1klU9TL Open first portfolio item.

via Chebli Mohamed