Cleaning SMC Pentax M 50mm f1.4 - Step by Step Documentations

I am going to share something but no gunpla this time. I have Pentax manual camera with interesting lens attached to it. It is Pentax SMC M 50mm f1.4 (or goto Amazon link). The condition is not good as it buried in the library for over 30 years. It is dusty and worst, a sign of fungi inside. In a quick research it is well known that many manual focus lens can still usable with adapter ring to get it attached into modern DSLR body. I am using Canon body and the PK mount (goto Amazon link) adapter needed to get this Pentax lens attached to it.

As a gunpla builder, ehem, it is challenging to try dissembling the lens and that's exactly what I just done. The lens is quite simple actually in term of construction, and if you used to done small parts in gunpla, this looks quite easy. The most challenging part is how to correctly clean up the dissembled lens (there are 7 lens inside) , remove the dust and fungi. As I am only amateur in lens cleaning, DO NOT take this step by step documentations as 100% correct.

Dismantling Pentax manual focus lens by gunpla lover

The tools I am using :
- screwdriver with correct size
- wet tissue for cleaning the body, lens cleaning cloak  for the lens
- lens air blower 
- something circular to used as cover opening tool, see step 2

This is my step by step documentation on the process for cleaning , dissembling the SMC Pentax-M 50mm 1:1.4 manual focus lens:

step 1, you'll need to open the cover in front of the lens