Marsh Marigold (Caltha palustris) UV + Vis

Marsh Marigold (Caltha palustris) UV + Vis

Description

Title:
Marsh Marigold (Caltha palustris) UV + Vis
Caption / Description:

Combined Ultraviolet and visible light photo of Marsh Marigold flowers in Spring. The flowers appear plain yellow to the human eye, which cannot see ultraviolet light. Under ultraviolet light a clear 'hidden' pattern can be seen, with the centre of the flower being dark while the edges of the petals are bright.

Many insects can see in ultraviolet light, it is believed that the ultraviolet markings on some flowers, such as the Marsh Marigold, help guide insects to the centre of the flower where the pollen and nectar reside.

Caltha palustris (kingcup, marsh marigold) is a perennial herbaceous plant of the family Ranunculaceae, native to marshes, fens, ditches and wet woodland in temperate regions of the Northern Hemisphere.

It becomes most luxuriant in partial shade, but is rare on peat. In the United Kingdom, it is probably one of the most ancient native plants, surviving the glaciations and flourishing after the last retreat of the ice, in a landscape inundated with glacial meltwaters.

Description adapted from Wikipedia: http://en.wikipedia.org/wiki/Caltha_palustris

Tags / Keywords:
  • Biota
  • Life
  • Vitae
  • Eukaryota
  • Plantae
  • Plants
  • Magnoliophyta
  • Flowering Plants
  • Angiosperms
  • Magnoliopsida
  • Dicotyledons
  • Buttercups
  • Ranunculales
  • Ranunculaceae
  • Caltha
  • Marsh Marigolds
  • Caltha palustris
  • Kingcup
  • Yellow Marsh Marigold
  • Ultraviolet
  • UV

Admin

Date Original Photo Taken:
Original File Name:
_DIR0026, 28, 29.psd
Event:
Rating:
Date this image added/last updated on website:
Original File Dimensions:
4182px x 2729px
File Type:
JPEG
Color Mode:
Original Image Color Profile:
Adobe RGB (1998)

Location

Location Created:
Sublocation:
City:
Market Harborough
Province/State:
Leicestershire
Country:
United Kingdom
World Region:
Europe
Geo-location:

Rights

Copyright Status:
Copyrighted
Licensing Status:
Rights Managed
Available for Editorial Use:
Yes
Available for Commercial Use:
Yes
Copyright Notice:
© 2013 Dave Kennard

Camera Data

Date Digital Resource was created:
Shutter speed:
1160 s
Aperture:
f/5.6
Camera Model:
Fujifilm IS Pro
ISO:
800
Exposure Compensation:
1
Focal Length:
80mm
Focal Length (35mm equiv.):
126mm
Metering Mode:
Center-weighted average
Flash:
Off, Did not fire
Exposure Mode:
Manual
White Balance:
Manual
Light Source:
Unknown
Exposure Program:
Manual

Additional shooting metadata

Lens:
Nikon EL-Nikkor 80mm F5.6
Filters used:
  • B+W 486 UV IR Cut MRC
  • Baader U
Additional Optics used:
  • Kenko DG Extension Tubes 20mm
  • 17mm-31mm M42 Focusing helicoid
Setup:
Tripod, Geared head, focusing rail.
For UV image: 2x full spectrum Vivitar 283 flash guns triggered by radio trigger used for lighting the flower. Another full spectrum Vivitar 283 mounted on gorillapod used for fill on the background flowers. Silver reflector placed behind flowers to bounce some of the light back and provide tiny bit more fill.
For visible light image natural light was used.

Post Processing

Image Modified:
Software used:
  • Adobe Camera RAW
  • Adobe Photoshop CS5
Post Processing:

Visible light image in multiply blend mode over UV image. Curves adjusted.