Topic: L.A. Verne, Paris Petzval 300/4 lens restoration
I bought few years ago petzval lens,
I refresh the brass and peeled off the interior blackening.
I put a new blackenings:
It looked ok, but there was a separation in front lens group:
I found an optical workshop where the separation was fixed. They uncemented the lenses, cleaned them, polished and aligned and cementetd it again
The final is, I think awesome.
and the results are also good, especially swirly bokeh: