60 / 4.5 Voigt

[pierre506]

I gave up to screw the front piece of my lens long ago.
Just inspired by Tuantwo's thread, I tried my best to screw the front glass again by using WD-40 today.
WD-40 is a really good assistant.
That's the result I found.
.

[pierre506]

Dia:

[Steven Tribe]

Sorry - not quite with you, must have missed a thread.
Is this a "standard" Voigtländer Heliar or something exotic/unique like the 60cm Portrait Anastigmat (Cooke patent) 60cm with front glass of 148cm?

[pierre506]

Sorry - not quite with you, must have missed a thread.
Is this a "standard" Voigtländer Heliar or something exotic/unique like the 60cm Portrait Anastigmat (Cooke patent) 60cm with front glass of 148cm?

Dear Steven,
It's a standard petzval.
I used to believe that it's just a no-named petzval because it's without the outside adjusting barrel and original hood.
Hoping you could know what I meant.
I wanted to screw off the front and rear piece when I got it. But I gave it up because it's too tight. And I left it under my tea desk.
The size of the lens is:
Height without hood: 29.5cm
Dia: 15.7cm
Tuantwo had screw off a huge no-named petzal to find there are words-DEROGY on the outside of the glasses.
So I was inspired to try to find what my lens is with WD-40 yesterday evening.
There are the expression left on the front piece as my thread title.