The clarity and glass on these are pretty incredible. That said, unfortunately, not all Mark 4 products are made in US, as I had thought (these are made in China). Also, good luck with not loosing the lens caps: it would help if they had a place for a "keeper cord" to attach them to the body.
Pros: Quality glass
Cons: Foreign-made
This review was written in the old system and had content requirements that are different than reviews written today.