[click on image to see a larger one]
Visible light image:
![](http://www.pbase.com/kds315/image/156384155/medium.jpg)
UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):
![](http://www.pbase.com/kds315/image/156384156/medium.jpg)
Simulated butterfly vision (UV - VIS) using XBV4 filter:
![](http://www.pbase.com/kds315/image/156384157/medium.jpg)
Simulated bee vision (UV - VIS) using XBV6 filter:
![](http://www.pbase.com/kds315/image/156384158/medium.jpg)
Quadriptych of the above (with bee/butterfly vision):
![](http://www.pbase.com/kds315/image/156384159/medium.jpg)
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 also using the new XBV4 filter.
The version developed from RAW 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