تويت
لحظة من الزمن ..
التأثير البشري ..
كتاب التصوير الفوتوغرافي المغلق
A moment of time
An impression of movement in large scale sub jects can be created with a slow shutter speed , but this does not work so well in close - up . To avoid a blurred image , use either a fast shutter speed or an electronic flash to freeze and define a moving subject . However , unless you use a high - speed film , it will not be possible to use a fast shutter speed and stop down the lens when taking an action close - up ; even then , a shutter speed of 1 / 1000th or 1 / 2000th sec will not be fast enough to record many actions . Electronic flash is an effective , convenient way of lighting and freezing fast movements at close range With multiple flash heads , connect one to the camera and fire the rest with slave units .
Computerized flash guns with a variable power sensor allow you to adjust the power and hence the duration of the flash . All the images on these three pages illustrate moving liquids and have been taken using computer ized electronic flash guns adjusted for speeds of between 1 / 10,000th and 1 / 25,000th sec . Even these small flash units are capable of recording an event which takes place too quickly for the naked eye to see . There is then the problem of precisely when to release the shutter . A light trip beam , or preferably a pair of crossed beams , connected to a motorized camera will ensure the shutter is released and flash is triggered only when the subject breaks the beam . To get a succession of fast move ments , use either a motor drive camera with a rapidly recharging flash , firing at a rate of several flashes per second ; or a stroboscopic flash to produce multiple images on a single frame ( see P. 114 ) .
Vibrating milk
I poured a thin layer of blue - colored milk into a shallow plastic tray which rested on an aquarium aerator . The vibrating surface generated a wave pattern . A high - speed flash highlighted the crests of these miniature waves , while a large flash lit the surface . Lens Hasselblad 80mm + 56mm extension Mag . on film x 0.7 Mag . on page × 1.2
Juggling jet
high - speed flash of 1 / 25,000th sec froze the water fountain on this sec exposure ingenious water toy . A gave an impression of the water spraying off the spinning ball , held aloft by the fountain . Lens Hasselblad 150mm + 63mm ( 55 + 8 ) extension Mag . on film x0.8 Mag . on page x1
Ink injection
Using a small , deep glass tank filled with water , I squirted a jet of red ink into the water . A pair of small flashes were directed in from each side of the tank to freeze the billowing ink cloud before it rapidly dispersed . I therefore had to empty the tank and refill it with clean water to take each subsequent picture . I found that the shape of the ink cloud varied every time , depending on the amount of ink and the force used to squirt it out . Lens Hasselblad 80mm + 32mm extension Mag . on film × 0.4 Mag . on page × 3
A coronet of ink
This picture has recorded the moment when a splashing drop creates a beautiful coronet . Because I needed to be able to release ink one drop at a time , I attached a chemical burette to a clamp stand and filled it with ink . After many trials using Polaroid film , I set up a light trip beam so that the falling drop triggered a motorized Hasselblad which set off a high - speed flash as the ink splashed into milk . Lens Hasselblad 80mm + 55mm extension Mag . on film x0.7 Mag . on page × 6.5
التأثير البشري ..
كتاب التصوير الفوتوغرافي المغلق
A moment of time
An impression of movement in large scale sub jects can be created with a slow shutter speed , but this does not work so well in close - up . To avoid a blurred image , use either a fast shutter speed or an electronic flash to freeze and define a moving subject . However , unless you use a high - speed film , it will not be possible to use a fast shutter speed and stop down the lens when taking an action close - up ; even then , a shutter speed of 1 / 1000th or 1 / 2000th sec will not be fast enough to record many actions . Electronic flash is an effective , convenient way of lighting and freezing fast movements at close range With multiple flash heads , connect one to the camera and fire the rest with slave units .
Computerized flash guns with a variable power sensor allow you to adjust the power and hence the duration of the flash . All the images on these three pages illustrate moving liquids and have been taken using computer ized electronic flash guns adjusted for speeds of between 1 / 10,000th and 1 / 25,000th sec . Even these small flash units are capable of recording an event which takes place too quickly for the naked eye to see . There is then the problem of precisely when to release the shutter . A light trip beam , or preferably a pair of crossed beams , connected to a motorized camera will ensure the shutter is released and flash is triggered only when the subject breaks the beam . To get a succession of fast move ments , use either a motor drive camera with a rapidly recharging flash , firing at a rate of several flashes per second ; or a stroboscopic flash to produce multiple images on a single frame ( see P. 114 ) .
Vibrating milk
I poured a thin layer of blue - colored milk into a shallow plastic tray which rested on an aquarium aerator . The vibrating surface generated a wave pattern . A high - speed flash highlighted the crests of these miniature waves , while a large flash lit the surface . Lens Hasselblad 80mm + 56mm extension Mag . on film x 0.7 Mag . on page × 1.2
Juggling jet
high - speed flash of 1 / 25,000th sec froze the water fountain on this sec exposure ingenious water toy . A gave an impression of the water spraying off the spinning ball , held aloft by the fountain . Lens Hasselblad 150mm + 63mm ( 55 + 8 ) extension Mag . on film x0.8 Mag . on page x1
Ink injection
Using a small , deep glass tank filled with water , I squirted a jet of red ink into the water . A pair of small flashes were directed in from each side of the tank to freeze the billowing ink cloud before it rapidly dispersed . I therefore had to empty the tank and refill it with clean water to take each subsequent picture . I found that the shape of the ink cloud varied every time , depending on the amount of ink and the force used to squirt it out . Lens Hasselblad 80mm + 32mm extension Mag . on film × 0.4 Mag . on page × 3
A coronet of ink
This picture has recorded the moment when a splashing drop creates a beautiful coronet . Because I needed to be able to release ink one drop at a time , I attached a chemical burette to a clamp stand and filled it with ink . After many trials using Polaroid film , I set up a light trip beam so that the falling drop triggered a motorized Hasselblad which set off a high - speed flash as the ink splashed into milk . Lens Hasselblad 80mm + 55mm extension Mag . on film x0.7 Mag . on page × 6.5
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