Cleaning lens element's in Leica Summaron screw mount f=2.8cm 1:5.6

Cleaning lens element's in Leica Summaron screw mount (M39)
f=2.8cm 1:5.6.

Take good care when cleaning the lens element's with the black ink on the lens surface or the edge, and use as less as possible of lighter fluid or "Eclipse" cleaning solvent on a "PEC-PAD" lens tissue, to prevent the ink from coming off the lens surface. IF some ink come's off, it is possible to re-paint it with black ink and a very, VERY FINE brush.
I use a 1mm flathead screw driver to just loosen the lock screw on the front, then use a rubber tool to unscrew the front.

****Here are some link's to different repair tool's:****

Japan Hobby Tool rubber cone:

https://www.amazon.com/Japan-Vacuum-C...


18 different size rubber repair tool's:

https://www.amazon.com/Sizes-Lens-Fil...


Divider Caliper Wing Compass:

https://www.amazon.co.uk/Divider-Cali...


You can also buy this set.

Lens Repair Set with pointed, flat, half flat tips:


https://www.amazon.com/dp/B00QRPWCN0/...