Anastigmat Skopar front group disassemble and cleaning

[blee1996]

Hi,

I recently got this Voigtlander Anastigmat Skopar 135/4.5 lens, that has some internal haze within the front group. I can unscrew the entire group out of the shutter, but I cannot find an obvious way to further disassemble.

Do you happen to have any experience? Thanks!

 

[Dan Daniel]

Usually the front metal part unscrews on these types of lenses. Look closely around the outer band of it for a set screw. And look for any hint of a gap indicating two pieces meeting. Especially at where the outer band ends going to back of the lens. Often with both precise machining and age/dirt/corrosion it can be hard to find the joint. Wipe any possible joint with solvent to clean/flush any possible dirt away.

 

[retina_restoration]

What Dan said, but it’s very likely that the front retaining ring is unscrewed by applying pressure with a rubber friction tool and turning. It may be very difficult to get the ring to unscrew, so a drop or two of naphtha on the threads may help.

 

[dxqcanada]

I think the front two elements are in a sealed group.

 

[blee1996]

Thank you all for the suggestions. I found another thread on photrio 2 years ago. It seems the beauty ring should be able to unscrew for further disassembling the two elements in the front group. I will try in the next couple of days.

 

[blee1996]

Just to close the thread, indeed the beauty ring screw off and everything can be cleaned properly.

 

[retina_restoration]

Just to close the thread, indeed the beauty ring screw off and everything can be cleaned properly.

As I suspected. Many front groups are disassembled this way. Well done!