Quote Originally Posted by bdial View Post
This video by our own Jason Brunner may help some in unraveling the lens's mysteries;

http://www.youtube.com/watch?v=CIFNdfjem18&feature=user
After following the instruction on this video, seems that the lens is a 200mm with an aperture of f/15.3 I'll just say /16.

So I have f/16, f/22, f/28, f/40, f/66 and f/100

Seems about right I hope