I got a fisheye lens for my Holga 120 CFN camera. I stuffed some 120mm film in there, attached the lens per directions, and proceeded to shoot some photos.
I think this lens is a fun gadget to noodle around with. I always have been fascinated by the fisheye effect, and was happy to get this lens for my Holga. I was actually surprised at how decent my results were.
See below here for more of my photos. The descriptions for each one is in the caption.
Poop Bags at Grater Memorial Park. I always grab a handful while walking Sputnik. 
Outside the Eicher Arts Center in Grater Memorial Park. 
There are the most adorable goslings on the other side of the Cocalico Creek.N 
No, just mud. 
Pretty flower from a neighbor’s bush. 
More pretty flowers.
Do I recommend that all Holga users go out and grab their own fisheye lens? Nah, but if you want to give a try, be my guest. You can get them for some of your hard-earned scratch over at lomography.com.
Jenn Dixon Photography 