PopUp Image No Resize

How i can set the ajax pop-up product image to show the original size
i found that the after resized image is bigger in file size and loading very slow

i would like it to keep original size, for the pop-up image only
i'm fined with the category and product image that without pop-up

Pls help me

i just found the solution here

DISABLE - Product Image Popup Size
http://forum.opencart.com/viewtopic.php ... ilit=popup

Big thanks to Okogawa