trying to disassemble a Voigtländer Compur-Rapid

carbo73

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A month ago I bought a cheap and not-working Voigtländer Bessa I with an Anastigmat Voigtar f4,5 110mm. I bought it just to practice some disassembly and basic repairs on Compur shutters, as this one is already damaged. But as I dismounted the front and back elements of the lens from the shutter I discovered a third element at the front (I presume this is the typical anastigmat triplet, right?).

As I have to lift the front cover of the Compur to get to the speed ring and the interior I've found that it only lifts half a millimeter. There's no way it goes upper and I don't want to force it more. Now I think that the third element of the lens, which has no apparent way to get unscrewed, is what stops the cover. Any ideas? Maybe I should unscrew this lens with some type of friction tool...

Thanks in advance.
 
It's a Compur Rapid, but I've already found that it was the inner part of the lens, which was stuck. I managed to unscrew it with a "friction tool" of sorts and open the innars of the shutter. I even managed to restore it minus it's B function, which does not work.
 
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