most famous French optics.
technical information about the optics.
Mr Corrado was showing a nice open petzval lens to me.
On my question: "Is this one for sale" he commented positive!
So now I am the proud owner of a "half plate" petzval.
Mr. Corrado D'agostini still owns the other half.
I want to use it during demonstrations, just to show how skilled they were
during the 17th century. It reveals all the mystery's of a petzval lens
The crazy thing is that it still produces an image when I point it to a light at the ceiling