[click on image to see a larger one]
Visible light image
UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):
Simulated butterfly vision image using XBV3 filter:
Simulated bee vision image using XBV6 filter:
Quadriptych of the above images:
Mexican Zinnia flowers have a very specific UV pattern. Their petals are very UV dark in the middle and bottom, but their petal tips are very UV bright, reaching much deeper into UV as any other flower I know (< 345nm), and all this gets nicely visible.
Stay tuned, more will follow on that fascinating subject...