Investing in Glass

[Daniel Bates]

The market has seen better days (and months) (and years). However, if my countless hours spent window-shopping used camera gear are any indication, lenses don't depreciate much, and in some cases, can actually increase in value. So, what lenses do you think would make the best "portfolio"?

I nominate anything that mounts on Leica and ends in "lux", the 200/1.8L, and the 50/1.0L.