Browsing Kigelia

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A buffalo (Syncerus caffer) herd moving to water pauses for a short while to browse on the flowers of the Sausage Tree (Kigelia africana), a favourite at this time of the year (October).
Population Trend : Decreasing; Threat: Least ConcernSource IUCN
(Canon EOS 5D Mk III/ EF100-400mm IS II USM; 1/500 sec; f/5.6; ISO 640; 200mm)

Picture ©2016 Andrew Field – Simply Wild Photography

The World of Lenses
Wide Angle Lenses are those lens which range between 21 and 35mm and is used in compositions which need more of the scene to be included in the photograph. Wide Angle lenses have an important role in landscape and architectural photography, making full use of their wider field of view, and is a favourite of the crime scene photographer and interior design imaging. The wide the lens the greater the tendency of the lens to magnify the distance between objects and introduce perspective distortion.

“Contradictions of perspective. Contrasts of light. Contrasts of form. Points of view impossible to achieve in drawing and painting. Foreshortenings with a strong distortion of the objects, with a crude handling of matter. Moments altogether new, never seen before… compositions whose boldness outstrips the imagination of painters… Then the creation of those instants which do not exist, contrived by means of photomontage. The negative transmits altogether new stimuli to the sentient mind and eye.”

– Alexander Rodchenko

Grazing Kigelia Flowers

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A favourite delicacy of most southern African antelope, a lot of primates and elephants too, are the beautiful flowers of the sausage tree (Kigelia africana) which occurs throughout tropical Africa. Here a Kudu (Tragelaphus strepsiceros) grazes on the flowers which have fallen from the tree. Often there is a symbiotic relationship between primates shaking branches and dislodging flowers in the tree and the animals which graze these flowers off the ground.
Population Trend : Stable; Threat: Least ConcernSource IUCN
(Canon EOS 5D Mk III/ EF100-400mm IS II USM +1.4x III; 1/500 sec; f/4.5; ISO 640; 400mm)

Picture ©2016 Andrew Field – Simply Wild Photography

The World of Lenses
Zoom Lenses, sometimes known as parfocal lenses where they retain focus through the focal range, are probably the most popularly used lenses, being especially prevalent among wildlife photographers. These lenses allow the user to adjust the focal length on the subject, while the image remains in focus (a zoom lens which loses focus during change to the focal length is varifocal). Zoom lenses suffer a loss of image resolution at maximum aperture, mainly at the extremes of their focal ranges.

“Here’s how you can tell if your ‘zoom’ is actually a varifocal. Zoom to maximum focal length and focus on an object manually about 10 feet away. Now zoom back to the shortest focal length. If the viewfinder is still sharp, you have a true zoom. If it’s hopelessly out of focus, it’s a varifocal.”

– Herbert Keppler

Pushing and Shoving

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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