تويت
تسجيل الحركة ..
العالم الطبيعي ..
كتاب التصوير الفوتوغرافي المغلق
Recording movement
When taking close - ups at larger than life - size , the lens is further from the film plane than from the subject , so that the subject move ment - however small - is magnified on the film . Therefore , if you wish this movement to be frozen , even greater care must be taken than when working at a distance .
Action can be conveyed in a still photo graph in a variety of ways . Perhaps , most obvi ously , the instinct is to freeze action either by using a fast shutter speed or a flash . In low light levels the first solution is not ideal since it will of necessity dictate a fast film speed , which immediately reduces the sharpness of a close up . On a sunny day , however , using a fast shutter speed with a motor drive camera may be the only way of achieving an action close - up .
way of recording moving subjects both indoors and outside , but it may bring additional prob lems for some subjects . For example , it will produce highlights on any wet or shiny parts of a subject or , indeed , objects behind the sub ject . Due to the rapid fall - off in intensity of flash , it can create an unnatural nocturnal appearance to subjects remote from a back ground , unless the flash exposure is synchro nized with the available light or an additional flash is used to illuminate the background .
One technique , which I often adopt for suggesting movement in a photograph , is to use a slow shutter speed ( ½ or 1 second ) . This is especially effective for conveying the im pression of water flowing over stones , down a waterfall or along a stream . It can also be a means of providing exciting abstract images and designs with colored moving objects ( see p . 58 and p . 96 ) .
Movement can also be exaggerated by using a slow shutter speed and altering the focal length of a macro zoom lens during the expo sure . When zooming is used in combination with a camera tilt or a pan , the image will be blurred in two directions - radially and later ally- - thus providing a greater sense of depth .
Fast repetitive flash
I used a stroboscopic flash to produce this multiple image of a mahogany seed . The shutter of the motorized Hasselblad was triggered as the falling seed broke a light beam and was left open for 1 sec with the stroboscopic flash firing at 30 times a sec to capture 11 images on a single frame . Lens Hasselblad 80mm + 10mm extension Mag . on film x0.2 Mag . on page × 0.5
A vocal frog
I found this reed frog calling at night beside a South African pond . I had to use electronic flash to provide the light source and also to freeze the movement of the inflated vocal sac . An assistant held a lamp for me to focus the camera and I used a flash set on automatic mode to obtain the correct exposure . Lens 105mm micro - Nikkor Mag . on film x0.3 Mag . on page × 1
A slow shutter speed
Using a 2 - sec exposure I was able to capture the essence of water flowing down a stream by recording the reflections of the sun as streaks of light instead of simple pin - points of light . The blurred highlights also contrast sharply with the static leaves trapped against an underwater branch . Lens 55mm micro - Nikkor Mag . on film × 0.1 Mag . on page × 0.6
A fast shutter speed
When I first saw the mud in New Zealand's thermal region repeatedly bubbling and plopping like boiling oatmeal , I was momentarily mesmerized . Even by using a shutter speed of 1 / 250th sec , I found it difficult to anticipate the precise moment to release the shutter so as to record the maximum expansion of the bubble before it burst . This was the best frame of several that I exposed . Lens 200mm micro - Nikkor Mag . on film x0.1 Mag . on page × 0.3
العالم الطبيعي ..
كتاب التصوير الفوتوغرافي المغلق
Recording movement
When taking close - ups at larger than life - size , the lens is further from the film plane than from the subject , so that the subject move ment - however small - is magnified on the film . Therefore , if you wish this movement to be frozen , even greater care must be taken than when working at a distance .
Action can be conveyed in a still photo graph in a variety of ways . Perhaps , most obvi ously , the instinct is to freeze action either by using a fast shutter speed or a flash . In low light levels the first solution is not ideal since it will of necessity dictate a fast film speed , which immediately reduces the sharpness of a close up . On a sunny day , however , using a fast shutter speed with a motor drive camera may be the only way of achieving an action close - up .
way of recording moving subjects both indoors and outside , but it may bring additional prob lems for some subjects . For example , it will produce highlights on any wet or shiny parts of a subject or , indeed , objects behind the sub ject . Due to the rapid fall - off in intensity of flash , it can create an unnatural nocturnal appearance to subjects remote from a back ground , unless the flash exposure is synchro nized with the available light or an additional flash is used to illuminate the background .
One technique , which I often adopt for suggesting movement in a photograph , is to use a slow shutter speed ( ½ or 1 second ) . This is especially effective for conveying the im pression of water flowing over stones , down a waterfall or along a stream . It can also be a means of providing exciting abstract images and designs with colored moving objects ( see p . 58 and p . 96 ) .
Movement can also be exaggerated by using a slow shutter speed and altering the focal length of a macro zoom lens during the expo sure . When zooming is used in combination with a camera tilt or a pan , the image will be blurred in two directions - radially and later ally- - thus providing a greater sense of depth .
Fast repetitive flash
I used a stroboscopic flash to produce this multiple image of a mahogany seed . The shutter of the motorized Hasselblad was triggered as the falling seed broke a light beam and was left open for 1 sec with the stroboscopic flash firing at 30 times a sec to capture 11 images on a single frame . Lens Hasselblad 80mm + 10mm extension Mag . on film x0.2 Mag . on page × 0.5
A vocal frog
I found this reed frog calling at night beside a South African pond . I had to use electronic flash to provide the light source and also to freeze the movement of the inflated vocal sac . An assistant held a lamp for me to focus the camera and I used a flash set on automatic mode to obtain the correct exposure . Lens 105mm micro - Nikkor Mag . on film x0.3 Mag . on page × 1
A slow shutter speed
Using a 2 - sec exposure I was able to capture the essence of water flowing down a stream by recording the reflections of the sun as streaks of light instead of simple pin - points of light . The blurred highlights also contrast sharply with the static leaves trapped against an underwater branch . Lens 55mm micro - Nikkor Mag . on film × 0.1 Mag . on page × 0.6
A fast shutter speed
When I first saw the mud in New Zealand's thermal region repeatedly bubbling and plopping like boiling oatmeal , I was momentarily mesmerized . Even by using a shutter speed of 1 / 250th sec , I found it difficult to anticipate the precise moment to release the shutter so as to record the maximum expansion of the bubble before it burst . This was the best frame of several that I exposed . Lens 200mm micro - Nikkor Mag . on film x0.1 Mag . on page × 0.3
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