Lightbox with magnification button?

I’m looking for a lightbox solution to showcase magazine articles that are scanned and made into jpg files. I want lightbox to automatically re-size the image to the browser window so visitor will see the whole page spread, but I also want visitor to be able to view it in full resolution, so one can drag the image around to actually read the article.

I tried number of lightbox plugins, i.e. lightbox plus, shadowbox, etc, but I can’t seem to find one that does auto re-size and have the “show in full” button to let visitors to view the image in full.

Does anyone have any recommendations?