No, I didn't use any kind of filter on this photo. I can't remember the setting on the camera, but I may have used the setting for cloudy day. That setting usually adds a little extra temp to the photo.
Hi Radek, I wish I knew the names of so many formations I photographed on my trip there last year. I think I took about a 1000 pix, but haven't posted more than a few because of that reason. I'm gonna add the name "Mars Hotel" to the photo. Thanks for the help.