Some resources are very detailed, others skim over; use them with care. Some of the resources listed are in Japanese. Well, if you don’t read Japanese, you can (i) look at the photos; (ii) use online translation tools (inaccurate but get you there somewhat).
Enjoy. Remember – if you mess up your lens, it is your responsibility.
I am an engineer by training, I enjoy photography, love listening to music, and am addicted to scuba diving; hence the nick diediemustdive. You are here not to read about me, but about the lens I am about to describe, but then you just might be interested to know a little more About Me. Go ahead and click on that link, if you will.