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Author Message   Camera_recycler Tinkerer Username: Camera_recycler Post Number: 1 Registered: 03-2011 Rating: N/A Votes: 0 Posted on Saturday, March 26, 2011 - 08:42 am:    Sorry to revive this old thread, but I thought this might be useful information to share. I figured out where most of the original Nikkor greases come from: "Nippon Koyu limited" in Japan. They make a series of precision optical greases that are widely used in Nikkor lens manufacturing. It's a bit confusing as they also call their product NPC, which I believe is the anglicized version of the Nippon Koyu name. In any case, NPC/Nippon Koyu make the series of greases that one often sees in Nikon lens repair manuals: FC-4, GE-7, GE-8, I-40 etc. If you see two letters, a hyphen and a number as the grease name in a Nikkor manual, it is almost certainly Nippon Koyu. They also make the "Photolub" series, which has about fifteen variants. It's sad that Nikon and Canon do not just stick to one or two greases!