Zeiss Otus 55mm lens cut in half.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...f_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h..._lens_half.jpg
Previously:
https://www.homemadetools.net/forum/...177#post126257
https://www.homemadetools.net/forum/...671#post170610
https://www.homemadetools.net/forum/...043#post140938
https://www.homemadetools.net/forum/...078#post125674
https://www.homemadetools.net/forum/...346#post165887
