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لمعان قزحي الألوان ..
لقطات مقربة إبداعية ..
كتاب التصوير الفوتوغرافي المغلق
Iridescent sheens
Iridescence is the term used to describe the rainbow - like colors which change as they are viewed at different angles to the light . This phenomenon , which is characteristic of inter ference colors , appears in everyday objects such as soap bubbles , oily layers and when heat is applied to polished steel or copper . The iridescent hues seen in these objects range through red , blue , copper , gold , bronze , green , blue and violet . The intensity of the colored hues in a soap bubble depends on the thickness of the soap film around the bubble and the angle at which it is viewed . A beam of light is reflected both from the outer and the inner surface of the film . This results in some of the wavelengths being in phase and therefore intensified , and others being out of phase and therefore cancelled out . As the bubble film thins out , so the colors change .
In the natural world , most colorations result from pigments produced by the plants from the uptake of minerals or by animals from their diet . Iridescent colors are produced by physical structures within , for example , feathers or scales , which cause light to diffract . Many animals sport iridescent colors , often as a means of attracting a mate . As a peacock struts in front of a peahen with an erect tail fan , the iridescent eye - spots on the feathers ( see p . 66 ) glisten in the changing light . Other examples of iridescent colors in the animal kingdom can be seen in the male Indian jungle fowl ( the ancestor of the domestic chicken ) , sunbirds , neon and cardinal tetras , dragonfly bodies , various metallic - looking beetles - notably the South American gold chafer - the tropical Morpho butterflies and abalone shells . Most splendid of all are the tiny humming birds or " flying jewels ".
Bird feathers and butterfly wing scales will retain their iridescence long after the animal has died , providing the feathers or the scales . are not damaged . However , the brilliant iridescent colors of the eye of a living horsefly soon begin to fade after the insect dies .
Photography of iridescent colors admirably illustrates the way in which the direction light strikes a subject can make or mar a close - up .
Before the bubble bursts
I mixed glycerine with concentrated household detergent and blew the bubbles onto a piece of glass laid on top of black plastic sheeting . I used four electronic flashes , each directed through a diffusing screen , to capture the rapidly changing interplay of colors on the front face of the bubble . Lens Hasselblad 80mm + 172mm ( 55 + 56 + 32 + 21 + 8 ) extension Mag . on film × 2.5 Mag . on page × 18
An oily road ▷ I noticed this strange colored patch on the road and took this stunning picture created simply from oil which had spilt on the road's surface . The picture was taken on an overcast day using a Benbo tripod to support the camera . Lens Hasselblad 150mm + 10mm extension Mag . on film × 0,1 Mag . on page × 0.5
لقطات مقربة إبداعية ..
كتاب التصوير الفوتوغرافي المغلق
Iridescent sheens
Iridescence is the term used to describe the rainbow - like colors which change as they are viewed at different angles to the light . This phenomenon , which is characteristic of inter ference colors , appears in everyday objects such as soap bubbles , oily layers and when heat is applied to polished steel or copper . The iridescent hues seen in these objects range through red , blue , copper , gold , bronze , green , blue and violet . The intensity of the colored hues in a soap bubble depends on the thickness of the soap film around the bubble and the angle at which it is viewed . A beam of light is reflected both from the outer and the inner surface of the film . This results in some of the wavelengths being in phase and therefore intensified , and others being out of phase and therefore cancelled out . As the bubble film thins out , so the colors change .
In the natural world , most colorations result from pigments produced by the plants from the uptake of minerals or by animals from their diet . Iridescent colors are produced by physical structures within , for example , feathers or scales , which cause light to diffract . Many animals sport iridescent colors , often as a means of attracting a mate . As a peacock struts in front of a peahen with an erect tail fan , the iridescent eye - spots on the feathers ( see p . 66 ) glisten in the changing light . Other examples of iridescent colors in the animal kingdom can be seen in the male Indian jungle fowl ( the ancestor of the domestic chicken ) , sunbirds , neon and cardinal tetras , dragonfly bodies , various metallic - looking beetles - notably the South American gold chafer - the tropical Morpho butterflies and abalone shells . Most splendid of all are the tiny humming birds or " flying jewels ".
Bird feathers and butterfly wing scales will retain their iridescence long after the animal has died , providing the feathers or the scales . are not damaged . However , the brilliant iridescent colors of the eye of a living horsefly soon begin to fade after the insect dies .
Photography of iridescent colors admirably illustrates the way in which the direction light strikes a subject can make or mar a close - up .
Before the bubble bursts
I mixed glycerine with concentrated household detergent and blew the bubbles onto a piece of glass laid on top of black plastic sheeting . I used four electronic flashes , each directed through a diffusing screen , to capture the rapidly changing interplay of colors on the front face of the bubble . Lens Hasselblad 80mm + 172mm ( 55 + 56 + 32 + 21 + 8 ) extension Mag . on film × 2.5 Mag . on page × 18
An oily road ▷ I noticed this strange colored patch on the road and took this stunning picture created simply from oil which had spilt on the road's surface . The picture was taken on an overcast day using a Benbo tripod to support the camera . Lens Hasselblad 150mm + 10mm extension Mag . on film × 0,1 Mag . on page × 0.5
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