>You can generally get it only as a set with the Titanium Hexar RF. The >price of the set started at about $4,000 but I have seen it closer to >$2,000 on ebay from Hong Kong. I paid $3,000 about 14 months ago. It is >not difficult to focus, but getting it in focus is critical to the end >result. On the photo of the two pilots, I focused on the profile of the >nose on the fellow on the right, and the edge of the other pilot's glasses >ended up in focus on him. Generally I focus on the eyes specifically.