Dismantling problem Helios M44-6

[Rafael]

Recently I bought a Zenit 122 with a lens Helios 44M-6.
But the lens has some fungus, so today I decided disassemble it and cleaning.

But now I have a problem: I can not remove the ring from the front

I turn the ring in the opposite direction clockwise with the help of a rubber to increase friction, but the ring is not completely unscrews, it seems that there is something that stops

Does anyone know how I can remove this ring?

Here's some pictures of this ring and a video:

http://youtu.be/myJnRv8cWIs





http://imageshack.us/a/img801/2950/fotos0194.jpg
http://imageshack.us/a/img825/3582/fotos0191c.jpg
http://imageshack.us/a/img715/705/fotos0190n.jpg

[peterqd]

[peterqd]

Hi Rafa and welcome! I quoted your post to show the pictures - now you can post them yourself. It's an anti-spam measure.

Has the filter ring been damaged and bent slightly?

If it is bent only very slightly you might be able to unscrew the ring by drilling small holes in at opposite positions and using a pointed lens spanner, a pair of large dividers or a micro gauge in the holes.

Otherwise, or if you don't want to drill the ring, you'll need to repair the dent. There is a special tool for this, like a small hand vice, but you can easily push the ring out of shape even more. Another way is to drift the dent out with a mallet and a wooden tool, with the lens fitted into a wooden former. There's a thread with instructions on this.

[Rafael]

Hi! Thanks for the answer

The filter ring are not damaged, but if I put a screwdriver underneath it bend a bit.

What is the name of the thread?

[peterqd]

[Rafael]

Sorry for my question, but my English is still very poor

I will try that. WD40 is safe? does not damage the lens?

[peterqd]

[Rafael]

Got it!

I used a lot of WD40 and did force with a screwdriver!



Uploaded with ImageShack.us

Thanks for helping me!

[peterqd]

Great, I'm glad you got there finally! Now you can get to the lens block.

There are many threads on the forum about cleaning lenses and removing fungus. Also how to dismantle the H44. The recommended way to get of light fungus is to use Ponds (or similar) Cold Cream - smear it over the lens, wait a few minutes and wipe it off gently with a soft tissue. Then you can clean it using water and a drop of detergent.

By the way, your English is pretty good, well done.

[Rafael]

Thank you! I'm trying not commit a grammar mistake

There is a product here in Portugal that women use, designed to smooth skin and remove makeup called NIVEA, maybe it's also good to remove fungus, I think that is a "coldcream" to but I'm not sure