Exposure Compensation

E
Posted By
Eyron
Aug 3, 2003
Views
249
Replies
3
Status
Closed
If I have a set shuuter speed (ie sync at 1/125 sec) and the correct aperature reads say F9 .
But I need a lower F stop to limit depth of field.
Will minus 3 stops of exposure control alow this and give me a 3 stop larger aperature?
Also what would my F stop be here?
Are there any drawback to use exposure compensation. ( ie noise etc.).

EEO
Related Tags
exposure

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GE
Gary Eickmeier
Aug 3, 2003
"Eyron" wrote in message
If I have a set shuuter speed (ie sync at 1/125 sec) and the correct aperature reads say F9 .
But I need a lower F stop to limit depth of field.
Will minus 3 stops of exposure control alow this and give me a 3 stop
larger
aperature?

Yes – that is what "stop" means –

Also what would my F stop be here?

I’m not sure, but you can just use either aperture or shutter priority AE mode and run the other up or down and find out. If you are in shutter priority mode, then increase shutter speed until you get the f-stop you desire. If you go aperture priority, just set the aperture you desire, and if there is enough range, the shutter speed will match.

Are there any drawback to use exposure compensation. ( ie noise etc.).

You aren’t talking about exposure compensation; you are just setting normal exposure. There is no drawback to any set or range of exposure combinations. Just the effects of high vs low aperture and high vs low shutter speed.

Gary Eickmeier
JM
Joseph Meehan
Aug 3, 2003
It sounds like you should only post your message once, and don’t do so much cross posting, it is considered bad manner. Some of the groups you included have little to do with your digital camera.

You should be able to change the "film speed" on your camera. Lower it to force a larger stop and less depth of field or raise it for more depth of field. ND (neutral density) filters also work and they work on digitals.

—
Joseph E. Meehan

26 + 6 = 1 It’s Irish Math

"JK" wrote in message
Eyron wrote:

If I have a set shuuter speed (ie sync at 1/125 sec)

and the correct
aperature reads say F9 .

So the camera is in shutter priority mode, or is it in program mode?
But I need a lower F stop to limit depth of field.
Will minus 3 stops of exposure control alow this and give me a 3 stop
larger
aperature?

First of all, -3 means 3 stops less exposure. In shutter priority mode, this would close the aperture further, which is exactly the opposite of what you want. So you neeed to to get to f3.5 or so to have much less depth of field. Going with a +3 setting will give you less depth of field, but your image will be 3 stops overexposed. What you really want to do is set the camera in aperture priority mode, then pick around f2.8 or f3.5 if you want shallow depth of field. The camera will then choose the appropriate shutter speed, which in this case would be 1/1000th of a second. If you have an slr, flash usually wouldn’t work properly at such a high shutter speed(since at high shutter speeds, the shutter curtain is never fully open over the whole film frame or sensor) In that case, you would want to lower the ISO rating the camera is set at if there is room to do that. So if you lower the ISO rating by three stops(ie from 400 ISO to 50 ISO), you can get roughly f3.5 at 1/125th of a second exposure.

Also what would my F stop be here?
Are there any drawback to use exposure compensation. ( ie noise etc.).
EEO
DS
Don Stauffer
Aug 3, 2003
Just keep in mind that one ‘stop’ worth of exposure time is a factor of two, while one stop difference is a factor of about 1.4 (or 0.7), since exposure goes as f/stop squared. That is, going from f/5.6 to f/8 is one stop difference, and would take a doubling of exposure time.

Eyron wrote:
If I have a set shuuter speed (ie sync at 1/125 sec) and the correct aperature reads say F9 .
But I need a lower F stop to limit depth of field.
Will minus 3 stops of exposure control alow this and give me a 3 stop larger aperature?
Also what would my F stop be here?
Are there any drawback to use exposure compensation. ( ie noise etc.).
EEO

—
Don Stauffer in Minnesota

webpage- http://www.usfamily.net/web/stauffer

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