Here is a side by side lens price comparison for Nikon & Canon. If you are doing some price shopping, this can help.
Double Exposure - Photoshop Action #photoeffect Download: http://graphicriver.net/item/double-exposure-photoshop-action/13600278?ref=ksioks
Advanced Double Exposure - Photoshop Action --- Recreate the legendary superimposition technique with your photos, images or artwork using this awesome action!
ModernArt Photoshop Action - Photo Effects Actions