Tuesday, July 1, 2014

Hawksbeard - Crepis in reflected ultraviolet photography, simulated butterfly and bee vision VIII

Today shots of another species of Hawksbeard - Crepis sp. in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter, as well as my XBV filters for simulating butterfly and bee vision, today now also using the reworked XBV4 filter. Lens was a CERCO 94mm quartz fluorite lens. Light source was a Xenon flash. All shots were done at about f8. Here now developed from RAW files.

[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 (UV - VIS) using XBV4 filter:

Simulated bee vision (UV - VIS) using XBV6 filter:

Quadriptych of the above (with bee/butterfly vision):

Hawksbeards outer petals reflect strongly UV around 365nm, there is a dark UV center and anthers, all invisible to us humans, and all that gets nicely visible from RAW files also using the new XBV4 filter.

The version from in-camera developed jpg files is 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