Working with Mamiya-Sekor C 1:2.8 f=80mm Sticky aperture blades and Stiff focus ring PART 1

In this video I will show how to work with Mamiya-Sekor C 1:2.8 f=80mm if it has sticky aperture blades or if there's a stiff focus ring. I will fully disassemble the aperture assembly and the focus assembly, then cleaning the parts and then in the PART 2 that will come sooner, I will show how to assemble the lens again.


REMEMBER TO set small marks BEFORE disassemble the aperture assembly and the focus helicoids!



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!!!