DaveO Posted October 24, 2013 Share Posted October 24, 2013 Oldfield, D. 2013. Thelymitra antennifera (Lindl.) Hook.f. (Orchidaceae) Rabbit Ears. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...ra-rabbit-ears/ Common SynonymLemon orchid Maldon, Victoria, AustraliaGower road, Maldon Historic Reserve5 October 2013Wildflower CommentA distinctive common orchid which grows in colonies. The flowers, which open only in sunny weather, are fragrant and yellow with two prominent dark brown ear-like structures on the central column. Visible Light: Pentax K-5 Full Spectrum Modification, Quartz 105 mm f/4.0 lens, Nikon SB-15 flash, 1/180 s @ f/16 ISO 200, B+W UV/IR Cut Filter.Image Reference: DO51452 Ultraviolet Light: Pentax K-5 Full Spectrum Modification, Quartz 105 mm f/4.0 lens, Nikon SB-14 flash, 1/180 s @ f/16 ISO 200, Baader UV-Pass Filter.Image Reference: DO51457 References:Jones, D. & B. A Field Guide to the Native Orchids of Southern Australia, Bloomings Books, 2000, p. 247. Atlas of Living Australia http://bie.ala.org.a...tra+antennifera Published 24 October 2013 Link to comment
nfoto Posted October 24, 2013 Share Posted October 24, 2013 Seems to be an orchid with a diversified UV signature. If possible, you should try UV-induced fluorescence as well. Link to comment
DaveO Posted October 25, 2013 Author Share Posted October 25, 2013 That will be a job for next year I think, if we are lucky enough to find some next year. This flower is known as a Sun orchid as it needs sunlight (and warmth) to open, so how would I see the fluorescence if the flower closes up in the dark? and how should I do that out in "the bush"? Link to comment
Andrea B. Posted October 25, 2013 Share Posted October 25, 2013 Good point. I have managed the rare outdoors fluorescence shot by tenting around a flower and then covering myself and camera with a blanket for fairly reasonable "darkness". But it isn't a particularly easy thing to accomplish. There are commercial zippered shooting tents, but I'm not sure the ones I have seen are dark enough. They might need an extra covering. So it remains an interesting problem to solve for those interested in pursuing in situ floral fluorescence photographs. Some flowers respond very, very quickly to changes in ambient illumination. Bjørn and I have both seen a flower turn to follow the sun in between a first visible shot and a second UV shot only some seconds later. :DSo it's possible that by the time tenting is set up, some flowers will have responded to darkness by beginning to close. Link to comment
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