Cleaning lens elements In Leica Summilux 1:1.4 / 50 (some fungus NOT good).
There was much more Fungus on the lens elements than I expected, and I could only remove some of the Fungus. And there was some Fungus between 2 cemented lenses..
But I could remove most of the dust and dirt, so it looks much better than it was, at least it can now being used...

I use Hydrogen Peroxide 3%, and do the final cleaning with Lighter Fluid.

I also try with vinegar to cleaning the Fungus away, but it did not help at all.

I also try to cleaning with "Eclipse" sensor cleaning fluid, but it did not at all work against Fungus, but can be used to cleaning away the dust, BUT take REALLY GOOD CARE when use it close to the black paint on the side of the lens elements! because it will take away the black paint!

I know some Leica lenses have some problems with serious Fungus between cemented lens elements in different lens groups. Maybe other people have some good ideas, if the case is just like this lens.



Here are some link's to different repair tool's and lubricating stuff:



"ORBIT" HEPA Blower:

https://photosol.com/products/orbit-h...

You can buy it here:
https://www.adorama.com/cpkhjdb.html




"Liqui-Moly" LM 50 Litho HT:

https://www.amazon.co.uk/Liqui-Moly-L...



"Liqui-Moly" LM47 MoS2 grease with Molybdenum disulfide:

https://products.liqui-moly.com/lm-47...



or on Amazon:

https://www.amazon.co.uk/Liqui-Moly-3...




Contact glue:

https://www.loctiteproducts.com/en/pr...



SpyderLENSCAL:

https://www.datacolor.com/photography...



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/...




JIS cross head screw driver's:


https://www.amazon.com/Moody-Tools-58...


Or this set, that is the set I use:


https://eustore.ifixit.com/en/Tools/D...




Lens cleaning wipes (PEC-PAD):


https://www.amazon.com/dp/B0161VIZZ8/...



Thin Cotton Buds x 200 you can buy them here:

https://www.muji.eu/pages/online.asp?...



DSLRKIT Pro Lens Vise Tool Repair Filter Ring Ajustment Steel 27mm to 130mm:


https://www.amazon.com/DSLRKIT-Repair...



Japan Hobby Tool Herical Grease Made in Japan:

https://www.amazon.com/Japan-Hobby-He...




Loctite 222 50ml Threadlocker

https://www.amazon.com/Henkel-Loctite...


And you will also need some Isopropylalcohol 99%

And sometimes Lighter Fluid that is very good to clean lens element's.

NOTE: Do NOT! use Acetone on platic part's, it will damage / melting the plastic!!!