Stiff focus ring in Mamiya-Sekor C 1:3.5 f=35mm DISASSEMBLE

Stiff focus ring in Mamiya-Sekor C 1:3.5 f=35mm DISASSEMBLE
the focus ring in this lens was very stiff, so in this video I will show you how you can fully disassemble the whole focus assembly, and also show how to measure the different helicoids, and how you are setting small mark's, THAT'S EXTREME IMPORTANT, the repair manual ( if you can find one ) wil NOT tell you that.

You will then be able to service your lens, so the focus assembly will be nice and easy use.

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

Some different grease and JIS screwdrivers:

2 Pcs Triangle Y-Tip Screwdriver Triwing Cell Phone Game Console:

Clamp tools:

Flex-I-File:

Ultra Fine Needle Piont Scriber #6114

Dental instruments are:

Hollenback Carver

“plastic instrument” (a.k.a. stellite)

Wall’s carver.

"ORBIT" HEPA Blower:

You can buy it here:

"Liqui-Moly" LM 50 Litho HT:

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

or on Amazon:

Contact glue:

Japan Hobby Tool rubber cone:



18 different size rubber repair tool's:



You can also buy this set.

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

JIS cross head screw driver's:

Or this set, that is the set I use:

Lens cleaning wipes (PEC-PAD):

Thin Cotton Buds x 200 you can buy them here:

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

Japan Hobby Tool Helical Grease Made in Japan:

Loctite 222 50ml Threadlocker