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11/16/2003 03:44:55 PM · #1 |
I made two photos today of the same subject. In both shots, the camera is the same distance from the subject and the camera settings are the same.
Focal Length: 195mm
Aperture: f/11
Shutter: 1/90"
Focal Length: 135mm
Aperture: f/11
Shutter: 1/90"
The aperture and the distance to subject has not changed... just the focal length.
Conclusion:
Longer focal lengths produce less depth of field at a given aperture and distance to subject.
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11/16/2003 03:49:02 PM · #2 |
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11/16/2003 03:53:45 PM · #3 |
| Exactly! This is the point, because of lesser Angle of View. The Exposure Tutorial of jmsetzler talk abaout it. You com read it in the tutorials page of DPC. |
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11/16/2003 04:12:15 PM · #4 |
Originally posted by GoodEnd:
Exactly! This is the point, because of lesser Angle of View. The Exposure Tutorial of jmsetzler talk abaout it. You com read it in the tutorials page of DPC. |
I have read it :)
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11/16/2003 04:34:29 PM · #5 |
Originally posted by jmsetzler:
Longer focal lengths produce less depth of field at a given aperture and distance to subject. |
Was this ever in doubt ? The one most people can't seem to cope with is if you move so that the subject is the same in each shot, for the same aperture, the DoF is the same.
Lets all say it again slowly, DoF is a function of magnification and aperture, nothing else. You changed the magnification...
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11/16/2003 05:20:01 PM · #6 |
Not in doubt.. just posting some photos to support it.
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11/16/2003 07:24:59 PM · #7 |
| I like your example because it clearly shows the difference. Maybe you could add the pics and statements to your tutorial. |
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11/17/2003 06:10:22 AM · #8 |
usefull newbe information here
bump
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11/17/2003 09:56:55 AM · #9 |
| where did the pictures go?? this is about where I am on my learning curve and pictures make much more of an imppression on me than words or numbers. |
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11/17/2003 10:01:56 AM · #10 |
Originally posted by emorgan49:
where did the pictures go?? this is about where I am on my learning curve and pictures make much more of an imppression on me than words or numbers. |
The links do work, even though the images don't show up directly.
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11/17/2003 10:15:50 AM · #11 |
| got them, thanks. was thrown off by the question marks. Great demonstation! |
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