Mike's "Prime"

I don't really have a prime fixed lens for my current camera.  I have a couple off of my film camera that I did not take this weekend so I set the 18-55mm to 18mm and took a series of pictures at our farm.
I recall the fish eye picture Ryan took of his niece a couple weeks ago having a lot of depth of field to it, and thought playing with the shortest lens I had would be interesting.  In fact I played with it more the next day.  Each trip acquiring a few more ticks.  I would guess this is about a 30mm lens in the 35mm world?.