John, looks like -1.33 is right on. Boy, the DOF at f5.6 is surprisingly good! Must hav to do with how far away from the flowers you are? Or that 30mm is wide angle? Did you crop much? It's been 10-15 years since I've been to Hawaii, got soooooo many flower pictures I couldn't store them forever, LOL. My best friend owns a small coffee farm above Captain Cook on Hawaii so my wife and I started there, and used it as or base for 3 weeks! Amazing, my favorite back then was Kauai, then Maui ;-). I sure wish there was a small, affordable camera back then! Just Leica, not affordable!
