msubees Posted July 17, 2014 Share Posted July 17, 2014 Huang, Z.Y. (2014) Hoya carnosa Thunb (Apocynaceae) Wax Plant. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...nosa/#entry3643 Okemos, Michigan, USA15 July, 2014Cultivar in home garden Comment:Photographs taken in the back porch of our house. The plant was grown inside a pot. Reference:http://en.wikipedia....nicera_japonica EquipmentCamera: Panasonic Lumix DMC-G5-broadband + El Nikkor 80mm f/4.5]. Visible Light [ ISO160, S8612 (1.75 mm thick), Canon Speedlite 199A with front cover removed] 1. Single flower, shutter speed: 1/60 sec, F/48, flash on hotshoe 2. Inflorescence, shutter speed: 1/60 sec, F/48, flash on hotshoe Ultraviolet [f/8, S8612 (1.75mm thick) + UG11 (1 mm thick), Canon Speedlite 199A with front cover removed] 3. Single flower, 1/60 sec, F/8, flash on hotshoe 4. Inflorescence, F/8, exposure 1 sec, with flash fired by hand (3x closer to flower than hotshoe) Link to comment
nfoto Posted July 17, 2014 Share Posted July 17, 2014 These are very nice. I have obtained the same UV signature from material cultivated in my country. H. carnosa also exhibits a pretty UVIFL. Try that if you not already have tested it. Link to comment
msubees Posted July 17, 2014 Author Share Posted July 17, 2014 Bjorn, Thank you! you have almost all the flowers! i need to buy a UV torch..I might try the mineral light tonight but it has some visible light (i broke the dark glass which blocks the visual). Andrea, do you have a link to buy the same type of yours? there are so many brands I am not sure which one is the right one. Edited July 19, 2014: I used the mineral light last night and saw this...some hint of UV induced visible fluorescence? http://ww2.beetography.com/var/resizes/UV/P1110524-UVIVF.jpg Link to comment
msubees Posted July 19, 2014 Author Share Posted July 19, 2014 Bjorn, please check the above photo to see if it is UV induced fluorescence. Link to comment
nfoto Posted July 19, 2014 Share Posted July 19, 2014 Hard to say. I'm not sure there is much UV to induce fluorescence in the first place? My UVIFL image of H. carnosa looks like this, Nichia 365 nm UV LED torch. ISO 200, 15 sec. f/11, D200, Kodak 2E filter. Link to comment
msubees Posted July 19, 2014 Author Share Posted July 19, 2014 hmmm, quite different...I used only 3 seconds...perhaps there were too much visual light in my photo. and these were just reflections? I need a torch.... Link to comment
Andrea B. Posted July 20, 2014 Share Posted July 20, 2014 Zach, my Nichia 365 UV-Led torch was made by Don McLeish and is called the Titanium Haiku. It cost approximately $500 a few years back. I think the Nichia chips have been improved since then. Don uses the screen name McGizmo and hangs out on the CandlePower Forums: http://www.candlepow...om/vb/forum.phpYou will probably have to search out his email address on that site and write him about what he is making these days. Link to comment
nfoto Posted July 20, 2014 Share Posted July 20, 2014 A powerful UV LED torch is one of the many (indispensable) tools for a UV photographer. Do remember always to put on your UV-protective goggles before such a torch is used. Evaluting UV-induced fluorescence is a major field of application of course. However, the torch can also be used for a quick assessment of the suitability of a lens for UV photography: shine the UV torch into the lens and look for signs of a haze inside. This usually appears brownish and if present, is a clear sign that the lens will block UV. Link to comment
msubees Posted July 21, 2014 Author Share Posted July 21, 2014 Thanks, Andrea and Bjorn. $500! that is a big investment.... Zach Link to comment
Alex H Posted July 21, 2014 Share Posted July 21, 2014 Recent prices in Europe for 3W Nichia torches (365nm) have gone down in recent years. Link to comment
msubees Posted July 23, 2014 Author Share Posted July 23, 2014 I have seen on the web some 5 and 10 w ones, just the bulb though, and one has to have a torch to house them. Link to comment
Alex H Posted July 24, 2014 Share Posted July 24, 2014 I am referring to 3-5W Nichia LED's instaled in torches. I have three of those. Link to comment
msubees Posted July 24, 2014 Author Share Posted July 24, 2014 Alex, can you share some links where you bought them? I should try to get one and test. Thanks. Zach Link to comment
Alex H Posted July 24, 2014 Share Posted July 24, 2014 I am again not getting email notifications from UVP. Something is not right. Zach, eBay item 111019138285, for example. Link to comment
nfoto Posted July 24, 2014 Share Posted July 24, 2014 Alex: I have observed the same issue with notifications after the migration to a new server for UVP. We are investigating the cause. Link to comment
msubees Posted August 4, 2014 Author Share Posted August 4, 2014 Alex, thank you! ZachI am again not getting email notifications from UVP. Something is not right. Zach, eBay item 111019138285, for example. Link to comment
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now