Out of Focus vs Handshake
Out of Focus vs Handshake Blurring
"Why is my photo always blur?"
I get that question asked all the time. We need to first differentiate between out of focus and handshake blurring before being able to rectify the problem. Out of focus is primarily due to the image not converging well on the image sensor, while handshake blurring is due to hand movement while the image is taken.
As seen above, the distinction between a OOF image and a handshake blurring image is quite visible. Out of focus images creates a softness on the overall photo, like what you see when you have short-sightedness. Whereas in handshake blurring, the images seems to overlap, due to movements when the image is taken.
With the cause of the blurring known, we are then able to rectify the problem. For images that are out of focus, simply get the focus point right before taking another shot.
Majority of the time, image blurring is due to handshake caused by insufficient shutter speed. As a rule of thumb, the shutter speed has to be at least 1/focal length in order to avoid blurring due to handshake. What does this mean? If your focal length is 50mm, then the appropriate shutter speed should be 1/50s or faster. If you're shooting at 200mm, the appropriate shutter speed will then be 1/200s.
Especially in low lighting conditions (restaurants, night shot), the shutter speed may be too slow for handheld images to be taken.
The obvious solution would be to increase the shutter speed, or increasing the EV value in exposure compensation. However, this might lead to an underexposed image. Increasing the aperture size will compensate for the shutter speed. However, in most cases the aperture is already wide open.
Therefore the last option will be to increase the ISO at the expense of image quality. If the image quality degrades too much due to noise to the extent it is unacceptable, use a tripod or the camera flash.
"Why is my photo always blur?"
I get that question asked all the time. We need to first differentiate between out of focus and handshake blurring before being able to rectify the problem. Out of focus is primarily due to the image not converging well on the image sensor, while handshake blurring is due to hand movement while the image is taken.
As seen above, the distinction between a OOF image and a handshake blurring image is quite visible. Out of focus images creates a softness on the overall photo, like what you see when you have short-sightedness. Whereas in handshake blurring, the images seems to overlap, due to movements when the image is taken.
With the cause of the blurring known, we are then able to rectify the problem. For images that are out of focus, simply get the focus point right before taking another shot.
Majority of the time, image blurring is due to handshake caused by insufficient shutter speed. As a rule of thumb, the shutter speed has to be at least 1/focal length in order to avoid blurring due to handshake. What does this mean? If your focal length is 50mm, then the appropriate shutter speed should be 1/50s or faster. If you're shooting at 200mm, the appropriate shutter speed will then be 1/200s.
Especially in low lighting conditions (restaurants, night shot), the shutter speed may be too slow for handheld images to be taken.
The obvious solution would be to increase the shutter speed, or increasing the EV value in exposure compensation. However, this might lead to an underexposed image. Increasing the aperture size will compensate for the shutter speed. However, in most cases the aperture is already wide open.
Therefore the last option will be to increase the ISO at the expense of image quality. If the image quality degrades too much due to noise to the extent it is unacceptable, use a tripod or the camera flash.
Labels: basic, photography
posted by white5tar at 12:51 AM
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