I saw this photo floating around and I just HAD to share. I have looked at all the instructions and it looks like it is a bit time-consuming, but your photography friend will love it! Here is a photo and the link for instructions on how to make the Nikon cake. Yummy!!
Here is a link to the full instructions on how to make this great cake: http://www.diyphotography.net/how-to-bake-a-nikon-cake