Manual focus lens cutaway.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...y_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...ns_cutaway.jpg
Previously:
https://www.homemadetools.net/forum/...177#post126257
https://www.homemadetools.net/forum/...043#post140938
https://www.homemadetools.net/forum/...990#post125175
https://www.homemadetools.net/forum/...078#post125674
https://www.homemadetools.net/forum/...754#post159730