Zeiss Otus 55mm lens cut in half.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...f_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net..._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
