Today shots of very decorative summer flowers, Mexican Zinnia - Zinnia haagenea in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter as well as a 340nm short pass filter for deep(er) UV photography. Lens was my CERCO 94mm quartz flourite lens. Light source was sunlight. All shots were done at about f5.6.
[click on image to see a larger one]
Triptych (left to right): Human vision, reflected UV (320-395nm), deep reflected UV (320-340nm):
Mexican Zinnia flowers have very specific UV patterns which reach quite deep into UV. Their petals are very UV dark in the middle and bottom, their petal tips, however, are very UV bright (here around 370nm outer tip, 365nm middle tip). Deeper UV photography reveals, that the outer tip part reaches even deeper into UV, deeper as any other flower I know of, and all this gets nicely visible.
I have previously written about those Zinnias HERE
Stay tuned, more will follow on that fascinating subject...