Just a little heads-up. Today at my favorite local photo bargain bin I got a "Dine Auto-Exposure Macro-light," which is a rather nice ring and direct lignt combination, made for closeups. It has TTL capability for older cameras if the right module is used (it's apparently shared with some older Sunpak). Anyway, with a little research I found that it's based on a Yuzo Auto Macro-flash unit, and with a little adventurous slicing with a thin sharp knife I discovered that underneath the Dine label one finds not only the Yuzo label but extended positions for a couple of the switches, allowing for higher ISO in Auto mode, and for plain manual mode, as well as a fixed 1/16 power manual mode. So if you have (or know the location of) one of these units, and have found that it is too bright or powerful for a lot of modern macro use, you might want to peel off that label. Butkus.org has the full Yuzo manual on line too.