Content Type - Image able to link to other website
you can do this by using any of the below modules :


Image Link Formatter



  This module is the result of the discussions around a requested feature
  to allow an image field to be displayed with a link to a custom URL



Image URL Formatter



  This module add a url formatter for image field. Then you can output
  image url directly.
  
  Most of the code, maybe more than 90%, is just copy from the drupal
  core. I think it is stable enough.
  
  I have created a content type, and add an image field instance to it,
  later i use views to export the data of this content type.And i want
  to output the data,then i could import it into another drupal 7 site
  with feeds module. What i need is the url of the image field, but i
  could not export the image url directly. That is why i create this
  small module.



Link



  The link module can be count to the top 50 modules in Drupal
  installations and provides a standard custom content field for links.
  With this module links can be added easily to any content types and
  profiles and include advanced validating and different ways of storing
  internal or external links and URLs. It also supports additional link
  text title, site wide tokens for titles and title attributes, target
  attributes, css class attribution, static repeating values, input
  conversion, and many more.