A purchasing Question.

[ricktas]

Even in the USA you can order USA manufactured gear, or "gray market" products, which are usually manufactured in Asia.

Ummm. NO!

Basically you are reading this wrong. What they sell is gear imported into the USA via the official distribution channels, and gear that is imported via grey market channels. Their wording tells you which import method was used for the item, not where it was made.

As Andrew says, if you get a particular lens, the major brands make that lens in only one factory. All lenses no matter where they are bought in the world, for that particular lens, come out of one factory. Nikon has factories in Japan, Thailand and China. For example all D800's are made in their Japanese factory. Doesn't matter if you buy your D800 in Beijing, Sydney, Singapore or New York, it is manufactured in one place, Japan.