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FORUMS Photography Talk by Genre General Photography Talk 
Thread started 22 Mar 2007 (Thursday) 10:56
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How do I get the depth of field I want?

 
ben4633
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Mar 22, 2007 10:56 |  #1

I am still kinda new at this and this website has taught me tons in a pretty short time. I want to know if there is a good way to select a aperature setting and know how large my depth of field will be. Right now I am using the trial and error method of selecting different settings and shooting away till I get what I want. Also, it is very easy to get too much backround blur, which in some pictures can be very distracting. I am trying to take pictures where objects in the backround or foreground are still distinguishable but blurry while my subject is sharp. How do you guys go about selecting an aperature for your shots? Thanks in advance for all your advice!


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inthedeck
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Mar 22, 2007 11:06 |  #2

Personally, for landscapes, I try and use f/16 and slower (f/22, etc). For Macro, DOF is very shallow, so f4 and faster (i.e. f/2.8, etc) is best. For Flowers in a window, f/8 to f/11 is best. There's lots of variations...and all depends on what you are shooting.

Can you post a pic, and maybe some could help you figure out what you want blurred, and what not? That might explain a little more, as to what you are trying to do. Also, stopping down a lens, to say f/8 or f/11 will usually produce a nice sharp object, with a bit of blur in the bg.

Here's a thread -- THREAD 1 -- in which the DOF is shallow (i.e. f 5/6) for that particular shot.

Here's a thread -- THREAD 2 -- in which the subject is far away, but the DOF is very shallow as well, since the subject is small.

Here's a thread -- THREAD 3 -- where everything is shown, and it's a small aperture, f/8 or slower.

Oh, and feel free to leave comments in either one. Hope that helps.


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rowdyred94
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Mar 22, 2007 11:08 |  #3

Experience with your camera and your lenses will help. There are formulas for this sort of thing, but even with college math I'm too lazy to deal with them. ;-)a


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In2Photos
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Mar 22, 2007 11:10 as a reply to  @ rowdyred94's post |  #4

There is always the DOF Calculator (external link).


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ben4633
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Mar 22, 2007 11:13 |  #5

rowdyred94 wrote in post #2912697 (external link)
Experience with your camera and your lenses will help. There are formulas for this sort of thing, but even with college math I'm too lazy to deal with them. ;-)a

This is what I was thinking, is it just experience that will get me what I want or is there a way to get the right blur in the right areas with formulas? I dont have the patience for college math either, I guess I just need to play with my lenses more, I will try to post some pics to give you guys an idea of what I am looking for. Thanks again


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DocFrankenstein
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Mar 22, 2007 12:02 |  #6

http://www.luminous-landscape.com …/Digital%20Focu​sing.shtml (external link)
http://www.luminous-landscape.com …ital%20focusing​%202.shtml (external link)


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DAMphyne
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Mar 22, 2007 12:26 |  #7

Does your camera have a DOF preview? Sometimes that can give you an idea of what is going on.
Best way is to experiment.
Shoot something close with a open f-stop and then go to a smaller f-stop, then smaller yet, without changing your camera position.
Do the same thing from a more distant position.
Do it again from farther away.
You'll see the change in DOF and with a little experience you'll get the hang of it.


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How do I get the depth of field I want?
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