Technical note: Ultraviolet reflectance-absorbance photography; An easy,inexpensive research tool

Photography in the ultraviolet wavelength is possible by use of special lenses, special filters, or both. This paper makes available pertinent information on an easy, inexpensive UV photographic technique. A comprehensive bibliography is provided. By using a flash guide number, lens apertures for various lens-subject distances can be calculated. The inexpensive technique is accomplished by simple adaptation of a Kodak Wratten 18A filter to the normal camera lens. The method is equally suited for living material, dried herbarium material, and chromatograms. The technique is useful in studies of pollination ecology, insect energetics, taxonomy, and flavonoid chemistry.