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Chelidonium majus L.
NO: Svaleurt
SE: Skelört
DK: Svaleurt
FI: Keltamo
DE: Schöllkraut
EN: Greater Celandine
Specimen collected outside Oslo, Norway, 23 May, 2012
Visible light: Panasonic GH2, UV-Nikkor 105 mm f/4.5 lens, Baader UV/IR Cut filter
Ultraviolet light (broadband 300-400 nm): Panasonic GH2, UV-Nikkor 105 mm f/4.5 lens, Baader U 2" (Venus) filter, Broncolor Minicom studio flash
Ultraviolet light (narrowband 335-345 nm): Panasonic GH2, UV-Nikkor 105 mm f/4.5 lens, BP340 filter, Broncolor Minicom studio flash. Black/white rendition.
There is no appreciable difference between the narrow- and broad-band UV captures so basically this species provides the same UV signature over the spectral range used by pollinators. Whether this is a general trend for flowers is not yet clear. Making narrow-band captures and in particular deep into UV-A/UV-B entails a significant loss of UV response by the camera so, technically speaking, broad-band records are less demanding and easier to accomplish.
[Last updated 26 Dec 2012]
