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ألوان غير عادية .. العمل بالألوان
.. كيفية التقاط وتطوير الصور الملونة
UNUSUAL COLOURS
Colour can also play a very different role in a photograph - bringing a touch of strangeness to the image . Filters are probably the most obvious method , but the choice of film can also make a surprising difference .
The simplest way of doing this is to use a strongly coloured filter in a single hue . At a stroke , this changes the nature of the image , and there are no restric- tions to the choice . The correction and balancing filters that we looked at earlier offer only a modest change , but those intended mainly for altering the response of black - and - white film are much more intense . These range from
LEFT The strange mauve cast in this landscape is the result of the use of Kodak Infrared Ektachrome film , which is partly sensitive to infrared wavelengths . Infrared sensitivity can make exposure calculations a little tricky , so it is advisable to bracket .
BELOW Even colours that are not technically compatible can work if used boldly and in the right combination . Again , the colours are at the heart of the success of this picture .
primaries like red ( 25 in Kodak's Wratten series of gelatin filters ) , to more exotic hues such as the strong pink of a Wratten 32. An alternative that offers more control and greater possibilities for manipulation is a coloured graduated filter . In this design , only half of the filter is tinted , and the edge of the tint is soft , so that in use there is no hard visible edge to the colour . A typical applica- tion for graduated filters is for the addition of colour to the sky , with the colour fading away at the horizon .
The danger in making this kind of colour manipulation is that it is almost too easy to do , and as a result can be a meaningless exercise . After experimenting with a few filters to see the possibilities , it is important to discriminate in the photographs you apply it to . Always think first whether the image would be better treated normally . If you set up a slide duplicating system , as described on page 120 , you may find that it gives you greater freedom to play with different colour treatments if you add coloured filters only when making copies of slides , not when shooting originals . When making prints , add the filters during enlargement , for the same reason .
One special type of film automatically gives a transposition of the normal colours in a scene . Infrared Ektachrome is a ' false - colour ' film that is partly sensitive to infrared wavelengths , and has its three dye layers arranged unrealistically . While scientific uses are its main application , its pictorial effect is unusual enough to justify experimenting . Exposure calculations are a little difficult to make , because of its infrared sensitivity - ordinary exposure meters do not respond in the same way . It is best to bracket exposures . The main drawback with this film must be processed in the outdated E - 4 process . Only a few distributors stock the appropriate chemicals for this ; their names are available from Kodak .
ABOVE AND BELOW It is important to use discretion in your choice of filters . For these two shots , for example , the strange colour casts occurred naturally , and did not need a filter to help matters . Note how colours that are not common in this case shades of purple - can be used to dominate a photo , without the risk of the picture becoming mundane .
.. كيفية التقاط وتطوير الصور الملونة
UNUSUAL COLOURS
Colour can also play a very different role in a photograph - bringing a touch of strangeness to the image . Filters are probably the most obvious method , but the choice of film can also make a surprising difference .
The simplest way of doing this is to use a strongly coloured filter in a single hue . At a stroke , this changes the nature of the image , and there are no restric- tions to the choice . The correction and balancing filters that we looked at earlier offer only a modest change , but those intended mainly for altering the response of black - and - white film are much more intense . These range from
LEFT The strange mauve cast in this landscape is the result of the use of Kodak Infrared Ektachrome film , which is partly sensitive to infrared wavelengths . Infrared sensitivity can make exposure calculations a little tricky , so it is advisable to bracket .
BELOW Even colours that are not technically compatible can work if used boldly and in the right combination . Again , the colours are at the heart of the success of this picture .
primaries like red ( 25 in Kodak's Wratten series of gelatin filters ) , to more exotic hues such as the strong pink of a Wratten 32. An alternative that offers more control and greater possibilities for manipulation is a coloured graduated filter . In this design , only half of the filter is tinted , and the edge of the tint is soft , so that in use there is no hard visible edge to the colour . A typical applica- tion for graduated filters is for the addition of colour to the sky , with the colour fading away at the horizon .
The danger in making this kind of colour manipulation is that it is almost too easy to do , and as a result can be a meaningless exercise . After experimenting with a few filters to see the possibilities , it is important to discriminate in the photographs you apply it to . Always think first whether the image would be better treated normally . If you set up a slide duplicating system , as described on page 120 , you may find that it gives you greater freedom to play with different colour treatments if you add coloured filters only when making copies of slides , not when shooting originals . When making prints , add the filters during enlargement , for the same reason .
One special type of film automatically gives a transposition of the normal colours in a scene . Infrared Ektachrome is a ' false - colour ' film that is partly sensitive to infrared wavelengths , and has its three dye layers arranged unrealistically . While scientific uses are its main application , its pictorial effect is unusual enough to justify experimenting . Exposure calculations are a little difficult to make , because of its infrared sensitivity - ordinary exposure meters do not respond in the same way . It is best to bracket exposures . The main drawback with this film must be processed in the outdated E - 4 process . Only a few distributors stock the appropriate chemicals for this ; their names are available from Kodak .
ABOVE AND BELOW It is important to use discretion in your choice of filters . For these two shots , for example , the strange colour casts occurred naturally , and did not need a filter to help matters . Note how colours that are not common in this case shades of purple - can be used to dominate a photo , without the risk of the picture becoming mundane .
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