By adjusting the aperture size, the photo will show different effect. when taking this photo, the apertue is tightly closed. Comparing to the photo below,the whole picture is much clear.
When wild open the aperture size, the focus will be getting smaller. we can see that the toy in the photo is clear while the around area is blur .
Depth of field(DOF) is 'the range of focus'. In other words, DOF is the sharpness of front and back of the focus object(target).Deep DOF means the image has wide(from front to rear) range of focus.You'll get clear background.Shallow DOF means the image has narrow range of focus.You'll get blurry background.
The major factors affecting DOF are:
1) Focal length of the lens. Short focal length=deep DOF.
2) The aperture size. Narrow aperture=deep DOF.
3) The distance of object. Distant object=deep DOF.
Aperture is the hole to accept lights.
Suppose the size of aperture is really small... like a pinhole. And suppose that you are seeing an object through the pinhole.You'll use only one eye and just can see the front of the object through the pinhole.You can't see left or right side of the object. You can hardly sense the distance between you and the object, and also the distance between the object and the background.
Next, when the aperture size is big enough as the size of a soccer ball, you will be able to use both of your eyes, see front and also some of the left, right side of the object. Now you can fill the distance of the object.
The bigger size of the hole(aperture) means the wider angle of incoming light rays.Wide angle of light rays tend to produce more 3-dimensional images.But actually the image is 2-dimensional, out-of-focus areas are blurred.On the other hand, narrow angle of light rays produce flat images.
Links of explaining DOF:
http://smad.jmu.edu/dof/
http://www.vanwalree.com/optics/dof.html
Note: there are some letters on the dial. "M"stands for "Manual", it means user can set the Aperture size and Shutter speed; "Av"stands for "Aperture value",It means When you set the aperture size, camera will determine appropriate Shutter speed. "Tv" stands for "Time value". You set the time(Shutter speed), camera sets aperture size automatically."P" is "Program". Camera determines everything according to its 'program'. this mode is suitable for the person like me to use. ^^! it is simple...[Some camera has different labels :Av = Fv = F/Tv = Sv = S]
By adjusting the aperture size, the photo will show different effect. when taking this photo, the apertue is tightly closed. Comparing to the photo below,the whole picture is much clear.
When wild open the aperture size, the focus will be getting smaller. we can see that the toy in the photo is clear while the around area is blur .
Depth of field(DOF) is 'the range of focus'. In other words, DOF is the sharpness of front and back of the focus object(target).Deep DOF means the image has wide(from front to rear) range of focus.You'll get clear background.Shallow DOF means the image has narrow range of focus.You'll get blurry background.
The major factors affecting DOF are:
1) Focal length of the lens. Short focal length=deep DOF.
2) The aperture size. Narrow aperture=deep DOF.
3) The distance of object. Distant object=deep DOF.
Aperture is the hole to accept lights.
Suppose the size of aperture is really small... like a pinhole. And suppose that you are seeing an object through the pinhole.You'll use only one eye and just can see the front of the object through the pinhole.You can't see left or right side of the object. You can hardly sense the distance between you and the object, and also the distance between the object and the background.
Next, when the aperture size is big enough as the size of a soccer ball, you will be able to use both of your eyes, see front and also some of the left, right side of the object. Now you can fill the distance of the object.
The bigger size of the hole(aperture) means the wider angle of incoming light rays.Wide angle of light rays tend to produce more 3-dimensional images.But actually the image is 2-dimensional, out-of-focus areas are blurred.On the other hand, narrow angle of light rays produce flat images.
Links of explaining DOF:
http://smad.jmu.edu/dof/
http://www.vanwalree.com/optics/dof.html
Note: there are some letters on the dial. "M"stands for "Manual", it means user can set the Aperture size and Shutter speed; "Av"stands for "Aperture value",It means When you set the aperture size, camera will determine appropriate Shutter speed. "Tv" stands for "Time value". You set the time(Shutter speed), camera sets aperture size automatically."P" is "Program". Camera determines everything according to its 'program'. this mode is suitable for the person like me to use. ^^! it is simple...[Some camera has different labels :Av = Fv = F/Tv = Sv = S]
1 comment:
The model of the photos are the famous 'Prof. Lim'.
Post a Comment