How difficult is it to use these two features. So you gain much more control at the cost of more effort. There are 6 possible settings between the shot on the left and the one on the right. The middle one is with an exposure compensation of -1 and the one on the right with an exposure compensation of -2. The one on the left is with no exposure compensation. To illustrate this procedure I took 3 shots of the plant above on a different day. With exposure compensation you can control the tradeoff between detail for the people and detail for the background. Another alternative would be to use exposure compensation. In the picture on the left the colors on the plant are washed out whereas on the right the plant looks good at the expense of a darker background.īut if the people picture above had of been taken with spot focus, the details of the people would have been clearly visible, but the background would have been totally washed out. The picture on the right is with spot focus on the plant. The picture on the left is a reduced version of the picture with the standard autofocus averaging scheme.
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To learn how to use spot focus I placed a plant in the sunlight against a background in deep shade. In such cases you can use SPOT focus or EXPOSURE COMPENSATION. However, there may well be cases where you can not compose the shot with more uniform lighting. In this case we should have been standing in the sun. Your first method of compensating for limited dynamic range so to move the people to a location where the variation in brightness is small. The easiest way of avoiding pictures like this is learning how to recognize the situation where they will occur: people in the shade against a bright background or people in the sun against a very dark background. The picture can not be improved much at all in Photoshop by increasing the brightness, because too much detail has been lost in the dark parts of the original picture. The background is bright and the people in the center are too dark. To see this consider the following bad picture. You can compensate for a limited dynamic range in people shots. We shall discuss the economic tradeoffs in buying this camera after showing you to what extent you can compensate for a limited dynamic range. But, there is a complicating factor as the dark portion of the picture on the right is lighter than the dark portion of the picture on the left. This was much more evident before the pictures were reduced in size. You can see more detail in the bright part of the picture. The picture on the right was taken by a Fuji F700 that has a new light collecting sensor that has a better dynamic range and the photo on the right was taken by a camera with the current CCD sensor. Right now one camera firm, Fuji, has one camera a F700 that has a sensor that has a better dynamic range as shown in the two photos copyrighted by Jeff Keller at DCRP: Just to the right is a crop of the small tree to the left of the big tree that has almost no details. In a photo with a large variation in brightness using autofocus the part of the picture in the mid range of brightness will have the most detail as shown in the crop below. To see this more clearly I have provided crops of the picture.Īs you can see there is almost not detail of the forest floor at the base of the tree.Ģ. If you were standing by my side while I was taking the picture you would have seen details in both the very bright and very dark parts of the picture. The details in the deep shade such as the small tree to the left of the large tree are also not visible. Note that the details in the bright sun, such as at the base of the tree are washed out. The picture on the left is of a costal redwood taken under conditions where the light varied from bright sunlight to deep shade. The current CCD light sensor used by digital cameras has a limited dynamic range.
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