How to avoid or reduce red-eyeWritten by Jakob Jelling
Photography with aid of a digital camera is beyond doubt very fascinating. However, it also has many a nooks that users of digital camera must be aware of and also must be well educated to deal with in order to produce good photographs worth most prized digital camera. Such a concept is that of red eye! In order to understand what this red eye actually is, a little detailed introspection is necessary. Basically speaking red-eye is a function of at least three things, they are firstly, ambient level of light because stumpy light level causes retina of person to be photographed to open wider to admit more light thereby divulging open iris, which is primary part that reflects red light hence giving appearance of red eyes for subjects. Also secondly younger person being photographed wider remains retina and hence greater effect of red eye in picture. Thirdly, reflection angle of flash plays a vital role, as light is recoiled back to digital camera and closer incident light beam is to this reflected light beam, greater becomes red eye effect. To prevent this instruments such as flash brackets are useful to make flash a bit removed from propinquity of lens. Thus red eye effect is somewhat revealed till this part of this discussion. Now is time to look into a greater detail in order to analyze various aspects of red eye effect and also find out ways of reducing problem as far as possible.
It can be noted here that only important thing is that users must ensure that proper fixing of angle between flash beam and lens axis. The general rule here is that photographer must keep angle wide enough that light beam from flash does not reflect off retina of person being photographed and comes right back into digital camera lens. A good idea is to make red-eye reduction work by making flash shine a light into eyes of person being photographed just before flash is incident and shutter is pressed. This causes irises in eyes of person being photographed to narrow down or shrink. As a result of this eye develops a smaller opening for eye view of digital camera and does not show off blood filled retina. This light is called pre light! And very importantly this process works only if person to be photographed is in point of fact looking directly at flash for pre-light to come.
Exposure compensationWritten by Jakob Jelling
The digital camera is in reality a great possession with many facets of its utilities and not only that knowing these utilities makes understanding digital camera complete. The utilities are also so very diverse that they too offer further introspection of details in their varying applications. Such an area is digital camera exposure compensation. Only knowledge of digital camera exposure is not enough, so digital camera exposure compensation requires some amount of exposure in itself! This discussion is focused towards that cause itself.
Looking at different digital cameras, even temperately costing digital cameras have arrangements for exposure compensation settings. To explain in a bit detail, exposure compensation allows users to control amount of light entering lens. And thereby illumination of photograph is decided. Exposure compensation can be altered manually or by help of a digital camera's exposure compensation setting that lets one override metered exposure set inside digital camera itself. Strictly speaking, exposure values provide an expedient line of attack to put a figure on available light intensity and therefore exposure.
As per general norms of users of digital cameras, certain standards exist for selecting such values. These values are specifically known as Exposure Values (EV). Selecting an up to standard Exposure Values (EV) helps maintain details contained in dark areas of a photo, or diminish more than usually bright areas. Again, looking from technical point of view, Exposure Values are numbers that refer to an assortment of combinations of apertures of lenses and shutter speed respectively. They have a selective range of values, ranging between -2 to +2 Exposure Values (EV). As a general rule positive exposure settings are used for cases where bulky areas of a scene are especially bright such as taking pictures of a snow scene and also during times of photographing when background is a good deal brighter than focal area under consideration. Also, negative exposure settings are used for cases where bulky areas of a scene are especially dark and also during times of photographing when background is a good deal darker than fore area under consideration.