How to Disassemble and Repair Oily Aperture Nikon 50mm 1.4 ai-s Prime Lens

Also check out  ...  Affiliate links: Lens Spanner (P3-S box spanner is my fave but can find similar ones elsewhere if you can't find the P3-S.):  ...  Spanner Wrench 3/32' (Tips flip in or out and can do jobs my box