During August, the Sausage Trees (Kigelia africana) are in bloom. Its dark maroon flowers are somewhat of a delicacy among some of the animals of Mana Pools, especially the elephants (Loxondonta africana). This bull elephant was pushing and shoving the tree in the hope that some of the delicate blooms would drop to the ground.
(Canon EOS 5D Mk III/ EF70-200mm IS II USM; 1/125 sec; f/5; ISO 640; 148mm)
Picture ©2015 Andrew Field – Simply Wild Photography
A-Z of Photography
Reciprocity is the relationship between a camera’s aperture and shutter speed. A correct exposure is achieved through a balance of the camera’s current aperture and the shutter speed at which shooting takes place. The process is automatic on most modern digital cameras and one setting will self-adjust to the changes made to the other. As shutter speed is increased, by manual adjustment, the aperture may be tightened or reduced and vice versa. Reciprocity failure was more a feature of photographs taken with film, but this translates to pixelation and noise in digital media. This give rise to the term ‘reciprocity law’ which means that different combinations of shutter speed and aperture can achieve the same exposure result. This allows for creative use of the camera in different environments.
“Grains and reciprocity failure in film = Noise and pixelate in digital”
– Lakshman Iyer