http://www.brightnightgallery.com/canfalkiv.html
A link to Mr. Palcholka's site, under Product Description he lists the image as Media: Unedited Photograph
http://munnecke.com/blog/?p=362
This site is someone who ordered his photos, a second person claim that the photos are not retouched.
http://www.twanight.org/newTWAN/photos.asp?ID=3001638
This site he admits it was a mosaic of four images.
http://www.terranuts.com/forums/showthread.php?t=10447
At this site, scroll down to MAC's second reply and he quotes Mr. Pacholka's reply on how he took the photo.