Zoomit

"Zoom-it  is a free service for viewing and sharing high-resolution imagery."  Enter the link to any image on the web, and they create a link with the capability to zoom in and move around the photo.   This is wonderful for exploring large infographics or minute details on images.    Zoom in on images, web files and pdfs.   You can also embed or link to a Zoom-it image to repost the movable image.