This little small weight WP plugin extends image preview for TIF/TIFF (High resolution uncompressed images), EPS (Vector images), AI (Illustrator images), WMF (Windows Meta Files), SVG (Scalable Vector Graphics) and PDF images/documents on the fly! Perfectly for ex. media and image libraries, press galleries, PDF-thumbnails etc.
NOTE: Requires Image Magic installed on the server. Not tested on Windows IIS-servers.
ImageMagic Downloads: http://www.imagemagick.org/script/download.php