Andrea B. Posted June 7, 2013 Share Posted June 7, 2013 Blum, A.G. (2013) Cylindropuntia acanthocarpa Engelmann & J.M. Bigelow (Cactaceae) Buckthorn Cholla. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...holla/#entry538 Desert Botanical Garden, Phoenix, Arizona, USA25 April 2013Wildflower in botanical garden Synonyms:Opuntia acanthocarpaReference:1. Epple, A.O. (1995) Buckthorn Cholla, page 162. A Field Guide to the Plants of Arizona. Falcon Guides, Globe Pequot Press, Guilford, CT.2. Desert Botanical Garden, Phoenix, AZ Comment: Equipment:[Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor][Nikon Coolpix A] Visible Light [f/11 for 1/200” @ ISO 100 in Sunlight with Baader UVIR-Block Filter] Visible Light [f/5.6 for 1/800” @ ISO 200 with Coolpix A] Ultraviolet Light [f/11 for 1/50” @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter] Ultraviolet Light [f/11 for 1/1.3” @ ISO 400 with SB-14 UV-modified Flash and Baader UV-Pass Filter] Link to comment
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