Depth of Field
Jun 9, 2012 10:10:03 #
Depth of Field (DOF) Most photographers understand the wider or the smaller the f/stop you use will blur the background or sometimes call bokeh. DOF can also be accomplished by a long focal length. This was shot at 270mm. f/6.3
Jun 9, 2012 10:53:32 #
Jun 9, 2012 11:07:57 #
Bokeh is different though, it is the quality of out of focus areas. Most easily seen in out of focus point sources of light, you can have a pleasing evenly lit circle or a harsh,edgy, rim lit circle.
Jun 9, 2012 11:24:15 #
Coker wrote:
Depth of Field (DOF) Most photographers understand the wider or the smaller the f/stop you use will blur the background or sometimes call bokeh. DOF can also be accomplished by a long focal length.
as well as magnification and distance to the subject. Closer subject or higher magnification = shallower DoF.
Jun 9, 2012 11:24:42 #
Bigdaver wrote:
Bokeh is different though, it is the quality of out of focus areas. Most easily seen in out of focus point sources of light, you can have a pleasing evenly lit circle or a harsh,edgy, rim lit circle.
I was surprised to see lens reviews that commented on the quality of the out-of-focus background.
Jun 9, 2012 11:55:32 #
jerryc41 wrote:
It has become a hot "gotta have it" item - like in-camera HDR and a few other things.I was surprised to see lens reviews that commented on the quality of the out-of-focus background.
Jun 10, 2012 07:16:45 #
To put it into slightly different words - focal length is immaterial - DOF is created by the F stop
Jun 10, 2012 07:33:41 #
BboH wrote:
To put it into slightly different words - focal length is immaterial - DOF is created by the F stop
I wish it were this simple. The those who are of the technical nature, here is a great site with the basic DOF equations: http://www.dofmaster.com/equations.html
If you keep a few things constant such as 'focus distance' and 'focal length', then adjusting the F Stop will create the greatest change in the DOF.
Jun 10, 2012 08:05:15 #
haroldross wrote:
I wish it were this simple. The those who are of the technical nature, here is a great site with the basic DOF equations: http://www.dofmaster.com/equations.html
If you keep a few things constant such as 'focus distance' and 'focal length', then adjusting the F Stop will create the greatest change in the DOF.
BboH wrote:
To put it into slightly different words - focal length is immaterial - DOF is created by the F stop
I wish it were this simple. The those who are of the technical nature, here is a great site with the basic DOF equations: http://www.dofmaster.com/equations.html
If you keep a few things constant such as 'focus distance' and 'focal length', then adjusting the F Stop will create the greatest change in the DOF.
There is also a DoF app.
Jun 10, 2012 09:43:30 #
"Affecting DOF are camera-to-subject distance, lens focal length, selected lens f-number, format size, and circle of confusion criterion. The combination of focal length, subject distance, and format size defines magnification at the film / sensor plane."
And don't let anyone tell you otherwise.
And don't let anyone tell you otherwise.
Jun 10, 2012 12:02:59 #
Jun 10, 2012 15:51:06 #
proteus1
Loc: NEVADA
jerryc41 wrote:
quote=haroldross quote=BboH To put it into sligh... (show quote)
An app for an ANDROID ? ? ?
Jun 10, 2012 16:07:07 #
DOF lessons were being provided on the site titled "Rockin On" or some such thing. They were up to Lesson three then it just disappeared. Here as well as on the Forum UHH" site. Anybody know what happened? I actually made a folder on my MAC to keep the stuff going back n forth but then that stopped coming. Help.
Jun 10, 2012 19:46:25 #
It really boils down to the actual size of the hole the diaphram makes, your tolerance for circles of confusion, and focus distance.
Jun 11, 2012 06:30:50 #
imagemeister wrote:
It really boils down to the actual size of the hole the diaphram makes, your tolerance for circles of confusion, and focus distance.
Thanmk you - what I did not say as well as you
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