Andrea B. Posted July 13, 2017 Share Posted July 13, 2017 Blum, A.G. (2017) Hesperis matronalis L. (Brassicaceae) Dame's Rocket. Flowers photographed in ultraviolet, visible and infrared light. http://www.ultraviol...-more-examples/ Seal Cove, Mount Desert Island, Maine22 July 2017Wildflower Synonyms:na Comment:Dame's Rocket can vary widely in colour from light or dark pink/magenta to reddish-purple to white. This white variant is moderately UV-reflective -- or, equivalently, moderately UV-absorbing. The center reproductive parts are UV-dark with brighter pollen.Rørslett (2013) first showed Hesperis matronalis on UVP in ultraviolet(1). Blum (2013) showed an example of UV-variation in Hesperis matronalis(2). References:1. Rørslett, B. 2012. Hesperis matronalis L. (Brassicaceae). Dame's Rocket. Flowers photographed in visible and ultraviolet light.http://www.ultraviol...s-dames-rocket/2. Blum, A.G. (2013) A UV Variant Example of Hesperis matronalis L. (Brassicaceae) Dame's Rocket. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ariant-example/3. New England Wild Flower Society (2017) Hesperis matronalis L. Dame's Rocket. https://gobotany.new...ris/matronalis/ Equipment [Nikon D600-broadband + Carl Zeiss 60mm f/4.0 UV-Planar] Click photos to view at 1200 pixels width (or height) in an expanded browser. Visible Light [f/11 for 1/200" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter]Like other Brassicaceae, Dame's Rocket forms seed bearing cases called siliques. Ultraviolet Light [f/11 for 5" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]A long exposure was used to permit a bit of sunlight to boost the UV-flash. Visible Light [f/11 for 1/1.3" @ ISO-400 with Onboard Flash and Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]A long exposure was used to permit multiple UV-flashes. Infrared Light [f/11 for 1/200" @ ISO-100 with Onboard Flash and B+W 092 IR-Pass Filter] Visible Light [f/11 for 1/100" @ ISO-100 with Onboard Flash and Baader UVIR-Block Filter]axAbaxial view of the flowers. Ultraviolet Light [f/11 for 15" @ ISO-400 with SB-14 UV-modified Flash and BaaderU UV-Pass Filter]A long exposure was used to permit multiple UV-flashes. Link to comment
Guest Posted July 16, 2017 Share Posted July 16, 2017 I especially appreciate the second image in this post; which helps to prove/display UV absorbance vs reflectance within the image. This has me thinking about making a miniature or at least very small calibration target which can be easily included in UV images without being obtrusive to the composition. Link to comment
Andrea B. Posted July 17, 2017 Author Share Posted July 17, 2017 That's a good idea. In order not to sacrifice composition, a UV photo could be shown which contains some targetry to establish the reflectivity record -- and then another more "artistic" version without the target(s) could also be shown. Link to comment
Andy Perrin Posted July 17, 2017 Share Posted July 17, 2017 Ooh, this one looks quite nice in UV, especially on the abaxial side! Link to comment
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