gonzo74
Member
Regarding the research. Do you have a good place to start? I assume we are talking serial numbers and the like right. I read certain versions flare more than others. If you have a reference that would be great. I've been keeping an eye out for one but haven't seen a thing in months (unless I count the super-overpriced variety).
I have seen in the $1150-$1600 range. I got mine at the lower end of the range (twice); fabulous lens. What I like most is its small form factor. There are some slight variations; you may want research it adequately.