Ten factors affecting the normal exposure.

Correct exposure is to ensure that the key to the success of photos in the actual shooting, despite the electronic metering systems help, but the novice photographer, it will often encounter the problem of incorrect exposure. .This is because the photography is very complex, affecting the normal exposure to many factors, little attention will be wrong. .Here, listed ten factors that affect the normal exposure: 1. .No <! - Text -> <p> correct exposure is to ensure that the key to the success of photos in the actual shooting, despite the electronic metering systems help, but for the beginner photographer, the exposure will not often encounter .the right questions. .This is because the photography is very complex, affecting the normal exposure to many factors, little attention will be wrong. .Here, listed ten factors that affect the normal exposure: </ p> <p> 1. .Lack of attention to the impact of environment on the photography. .In the same weather conditions, shooting in different environments, the demand on the exposure will change. .For example, in the snowy wilderness, or in the vast beach, the environment arising from the strong reflected light, so exposure should be taken than in the general environment to reduce a file or so. .</ P> <p> <! - Post ads --><!-- table width = "100%" border = "0" cellspacing = "0" cellpadding = "0" align = center> </ table- .-> </ p> <p> 2. .Changing the ISO value, the failure to make timely amendment to the exposure value. .Sensitivity we usually are used generally 1S0100. .Sensitivity in the use of other, such as IS0200, IS0400 exposure must be amended accordingly and timely. .At present, most cameras will automatically adjust according to ISO aperture and shutter, but in the manual, pay special attention. .</ P> <p> 3. .The result of the background is too bright. .If large areas of sky in the background of the outdoor shoot portraits, should be assisted to improve the character of the brightness of light, human beings and the sky shorten the gap between the light and shade. .Failure to do so if a bright background exposure as the exposure basis, that figure would have underexposed phenomenon. .</ P> <p> 4. .Reciprocal rate of failure. .Too long or too short exposure time, the same amount of exposure does not produce the same photographic effect. .So when we conduct a small aperture, slow speed of the exposure time (slower than 1 / 2 seconds), you should consider this factor, due to increase exposure. .</ P> <p> 5. .Use of over the limit. .Some people think that fool the camera with flash, but also has automatic metering, exposure device, so the environment in some dark when shooting conditions are often not identified, so that a bright flash trouble, but the results are often unsatisfactory. .This is because the stupid camera flash index is small, its effective range is only within 3 meters, 3 meters when the characters far beyond the case will appear underexposed. .</ P> <p> 6. .Using the flash as light source, the index did not follow the correct calculation of light exposure. .</ P> <p> 7. .Shooting, plus colored filter on the lens, but no corresponding increase in exposure value, the result will be the consequences caused by lack of exposure. .</ P> <p> 8. .Not take into account seasonal factors. .Throughout the year, the strength of the Earth by the sun varying degrees. .Summer, direct sunlight the ground, the strongest brightness; winter, the sun dipped surface brightness weakest. .The spring and autumn light, the brightness range between summer and winter. .Therefore, the same scene in different seasons, the exposure value should be used differently. .Spring and autumn; exposure should add a file than in summer; in winter than in summer to increase the exposure you need two steps. .</ P> <p> 9. .Not a geographical situation. .Because the subject is located in different regions of the intensity of light will be different. .Location from the equator near, suffered light intensity; far away from the equator, suffered light is weak. .So, usually each additional 15 degrees latitude, exposure should increase the half-file. .To my country, in the same shooting conditions, the south than the northern region should reduce the level of aperture. .The subject is the elevation of which also affect the level of exposure. .The higher the altitude, the thinner the air, the less sunlight absorbed by the atmosphere, the brighter the light. .Therefore, every increase in altitude of 3,000 meters, exposure should be reduced by one stop. .</ P> <p> 10. .The subject matter worthy of the rough surface with smooth, deep color and light, absorbed by the object will affect the ability of light and reflected light. .So, that is, in the same light exposure, the scene should also seriously consider the ability to reflect light. .Such as snow, water, sand and other views, reflecting performance, light-sensitive than the average amount necessary to adequately reduce the landscape; and take those rough surface, deep black color of objects, such as bushes, coal pile and so on, than, the amount of light .appropriate increase in ordinary scenes. .<! 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