Pin-hole test

This week I was given the opportunity to borrow a colleagues homemade pin-up cap, so I took some test shots. I also borrowed this set of cats to shoot for the test.
When shooting with a pin-hole cap, you don't use a lens
The cap- front & back. On the front of the cap is a drilled hole in the plastic cap, with a filter attached to the front. There's a piece of metal with a tiny pin hole in it taped to the back of a camera body cap. 
This is what I got with the cap straight on the body 
Then I added a fisheye adapter to the end of the cap, and this is what I got. I wasn't expecting this result with the fisheye adapter. I was expecting a much wider area of view, but instead it looks like you're looking through a doors peep hole.