Today about the same Gazania flower Treasury flower - Gazania rigens in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, but this time comparing them to two other UV transmitting filters, a stack for longer wave UV using Schott UG1 and one for shorter using Schott UG11 plus as IR blocker Schott S8612 filter. Lens used was the 94mm CERCO quartz fluorite lens. Light source was a modified for UV high power Xenon flash.
[click on image to see a larger one]
Visible light image using UV/IR cut filter:
UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):
UV image using a UG1 filter stack:
UV image using a UG11 filter stack:
Interesting to notice, that those UV marks gets more or less visible using also those two filter stacks, however the shorter wave one has a clear edge over the longer wave one, revealing much finer details, and that all gets nicely visible.
There is a follow-up article about those filters, using individual white balance HERE.
I have written about that flower previously HERE.
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos