Lens of Truth
This is my version the Lens of Truth as seen in both Legend of Zelda games Majora's Mask and Ocarina of Time.
Start
I started with a 5" magnifying glass I purchased off of amazon for 10 bucks.
http://www.amazon.com/Carson-HU-20-5-BigEye-Magnifier/dp/B000JQ3A70/ref=sr_1_8?ie=UTF8&qid=1381250536&sr=8-8&keywords=magnifying+glass
http://www.amazon.com/Carson-HU-20-5-BigEye-Magnifier/dp/B000JQ3A70/ref=sr_1_8?ie=UTF8&qid=1381250536&sr=8-8&keywords=magnifying+glass
Handle
The handle was made out of a piece of poplar wood turned down to my desired shape. Then I drilled a hole the size of the magnifying glass shaft, and slipped it over aforementioned shaft.
Lens
The magnifying glass as it comes is flat, so to give it some volume as it looks in the games I added some epoxy putty to the rim. After hand smoothing as much as possible I sanded until I reached the desired smoothness.
Horns
The horns were made from cast plastic. The gem part was cast from a store bought gem from a wedding gem pack. It was then cast in Smooth-cast 325 with red So-strong pigment to give it the ruby look. The pieces that the gems rest on was a turned piece that I cast to get multiples. For both molds I used Smooth-on Mold Star 16 Fast.
Eye
The eye was as simple as printing off the shape in red on photo paper. At some point I might go back and make a cast piece, but the paper works for me.
Paint
For painting I used an airbrush for the many components then hand painted the lens. I used an iridescent purple airbrush paint that I mixed myself to get the right color. Then washed over everything with a coat of black. I did use a spray can to get the gold pieces painted the right color.