[UV] 340nm Jupiter-U filter for short wave reflected UV

Today about a new prototype filter of mine. It is called "Jupiter-U" and it is a shorter wave filter than the Baader U (Venus) filter, that I mainly use for reflected UV photography. Its center wavelength is around 340nm.

[click on image to see a larger one]

It is a shorter wave filter (center is 340nm) and its transmission is this, as compared to the Baader (Venus) U filter (red line): Here now some first impression about using the Jupiter-U filter. Target was a Gazania flower. Left: Venus U2, right Jupiter-U: Here VIS comparison shots: Baader-U (Venus U): Jupiter-U: Interesting to note the metallic golden rendering of leafs: Here now using a bred Kalanchoe floower in a quadriptych showing the VIS image (top left), Baader U2 (top right), Jupiter-U (bottom left), special 300-350nm filter (bottom right) and in more detail: If you look closer at the flower center, you'll notice only in the two shorter wave shots on the bottom a variation of reflectance (indicated by changing colors)

[To make things clear, this is a filter for my work, it is not for sale.]

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

Lokrum Botanical Gardens Croatia - reflected UV photography

Last week I visited Croatia and one day we were at Lokrum island, located just opposite of Dubrovnik in the Adriatic Sea. Lokrum has a Botanical Garden which is managed by the University of Dubrovnik. Here a few impressions, all as VIS-UV diptychs. The UV shots were done using the Baader U filter (320-390nm).

[click on image to see a larger one]

Iris croatica, the country flower: Carpobrotus acinaciformis, seen all around the coast: Rhaphiolepis umbellate, a decorative tree, seen a lot in parks: Anagallis coerulea, a very pretty "weed" and then the "stars" of the park, which were brought in from Chile years ago Puya chilensis, about 2.5 meters tall flower stand: Puya berteroniana, same size, but full of these turquoise colored flowers Here a weed,Hypochoeris radicata, seen all over on the street curbs etc. as well as Malva sylvestris Anagallis arvensis, also a nice weed: Oxalis corniculata, another nice weed: Crocosmia xx (yet unidentified species), an ornamental plant: Crocosmia aurea, also an ornamental plant:

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