You are downloading the Zoom XAP file v18.104.22.168 for Windows Phone. Zoom is a free Photo & Video App: ZOOM is high resolution photo viewer that supports full resolution mode for very large images. The default photos app of Windows Phone 7 and 8 shows up to 2048. You can now download the offline XAP package file to install & try it.
Download Locations for Zoom 22.214.171.124 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Zoom XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.