Site images flicker when loading on mobile Safari

here's site: http://www.jonduenas.com/portfolio-1/

own photography portfolio site designed myself (i promise isn't shameless self promotion). when load on own iphone , ipad, images start flickering when load, , what's worse when it's done, images pixelated, when zoom page, safari hasn't rerendered yet. don't have issue when loading on desktop. help? might have php use load images page? i'm no php, had friend write me while ago. don't recall being issue on older versions of ios either. it's been annoying me lately.

 

those models freakin' gorgeous... 'specially redhead towards beginning...

*ahem* mean, have tried turning on debug console in mobile safari? might pinpoint issue.

settings > safari > advanced

 

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