Certo Super Dollina II

[Karl Hermann]

I am the owner of a Certo Super Dollina II produced after the WW II. I tried to demontage the objective because I noticed fungus on the surface of the lenses.
The demontage of the front lens was no problem. But I had no success in order to remove the back lens. The lens is fixed with rings. The first ring was no problem. But the other rings are rotating but they do not the leave the place where they belong. I am only able to move the rings in a circle.

What can I do? Thank you for your help.

 

[Beemermark]

What is the meaning of "demontage"?

 

[CharlesDAMorgan]

Un mount - remove.

I can't help, but welcome and I'm sure someone who can help will be along.

 

[Karl Hermann]

Thank you for the welcome.
I am living in Germany (Halle (Saale).
I intend to disassemble the lens in order to remove the fungus.

 

[Dralowid]

From memory...I used to have a few Dollinas...you may find it easier to dismantle the lens if you remove the whole shutter and lens assembly in one go.

To do this you need to undo the outer ring in your picture, the one with only two notches in it (I think).

Beware.

Be very careful with the shutter release linkages which are delicate and from memory complicated...also...do not stick your tools through the bellows!

 

[Karl Hermann]

Thank you for your answer and your help. I will try it.