Firstly I must take off my top hat and bow to Gogglerman for his wonderful creations and inspiration. He is a true artist and this project would not have been conceived if not for him and it would not have been attempted without his inspirational work. If you enjoy this project I hardily suggest you look up Gogglerman and get ready to be wowed. Now on to the fun part. I constructed this Iris aperature out of plate and sheet brass. On this first attempt at an Iris aperature I used silver solder and a propane torch to solder the pieces together. If no one has ever tried this I would submit that it is a pain in the hind quarters. On the subsequent projects after this piece I utilized a high powered electric soldering iron which proved to be much easier. Due to a lack of planning and a mistake on my part I ended up using a five leaf mechanism instead of six leaves, this gave it a slightly less than professional finish but overall I am pleased with it. I hope you enjoy it. I will add more body to this instructable as time passes so keep an eye out for changes to it and new instructables I will be posting.
Thank you Gogglerman!
(Here is a link to Gogglerman's page)