The manual for this ring-flash says that it's suitable for just a few lenses (50/100 Macro etc). Why is that? Has anybody used it with other, reasonably close-focusing or inverted lenses? I have the FA50/1.7 and the 75-150/4 (inv) in mind, or the F28-80/3.5-4.5.
Thanks, Kostas p.s.: No, I haven't bought one :-)
