Getting a sharp image
In order to obtain a sharp image, proper focusing has to be carried out to ensure that the image converge on the plane of the sensor. Improper focusing would lead to out of focus (OOF) images as shown below.
A well focused image is shown with the words clear and sharp. A slight deviation off the focus point results in a slightly OOF image as shown above. A clearly OOF image is presented with everything out of focus. As most camera has an autofocus function nowadays, depressing the shutter trigger halfway allows the camera time to focus, before taking the shot.
Take note that the out of focus image in this case is DIFFERENT from the out of focus area due to aperture size. In this case, the desired point of interest is not focused, as opposed to that of DOF, where only the background is out of focus. Also take note of the handshake warning sign that indicates a slow shutter speed which will be addressed later.
As for DSLR, the focus dot indicates whether the focus area in the viewfinder is in focus. Look out for the GREEN dot (for Nikon) to determine whether your focusing is appropriate.
Composing a Shot
Although most camera has an autofocus function, they are not quite as smart as to know which is the area of interest we want to be in focus. (Although they ARE getting smarter with multi detection and all) Therefore I advocate "telling" the camera specifically where is the point of interest before composing the shot.
This can be done by first pressing the shutter button halfway over the area of interest to focus on the point, and then composing the shot with the shutter button still held down halfway.
For the example above, the camera was "told" to focus on the head of Wimpey the truck, and with the shutter button still held the shot was then composed before depressing the button fully to take the shot. This results in the head of the truck being in focus, and the rear being out of focus, as shown in the resulting image below.
A well focused image is shown with the words clear and sharp. A slight deviation off the focus point results in a slightly OOF image as shown above. A clearly OOF image is presented with everything out of focus. As most camera has an autofocus function nowadays, depressing the shutter trigger halfway allows the camera time to focus, before taking the shot.
Take note that the out of focus image in this case is DIFFERENT from the out of focus area due to aperture size. In this case, the desired point of interest is not focused, as opposed to that of DOF, where only the background is out of focus. Also take note of the handshake warning sign that indicates a slow shutter speed which will be addressed later.
As for DSLR, the focus dot indicates whether the focus area in the viewfinder is in focus. Look out for the GREEN dot (for Nikon) to determine whether your focusing is appropriate.
Composing a Shot
Although most camera has an autofocus function, they are not quite as smart as to know which is the area of interest we want to be in focus. (Although they ARE getting smarter with multi detection and all) Therefore I advocate "telling" the camera specifically where is the point of interest before composing the shot.
This can be done by first pressing the shutter button halfway over the area of interest to focus on the point, and then composing the shot with the shutter button still held down halfway.
For the example above, the camera was "told" to focus on the head of Wimpey the truck, and with the shutter button still held the shot was then composed before depressing the button fully to take the shot. This results in the head of the truck being in focus, and the rear being out of focus, as shown in the resulting image below.
Labels: basic, photography
posted by white5tar at 12:02 AM
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