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Exposure compensation
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Feb 20, 2021 18:16:48   #
Old Coot
 
Having set up your camera to take photo using Manual mode, ie set aperture, set time, set iso. What is altered or changed when you apply Exposure compensation

Feb 20, 2021 18:25:05   #
ecobin Loc: Paoli, PA
 
Old Coot wrote:
Having set up your camera to take photo using Manual mode, ie set aperture, set time, set iso. What is altered or changed when you apply Exposure compensation


Nikons will change the ISO for exposure compensation. I'd guess that the other camera do the same but don't have first hand experience.

Update: Sorry, the above comment applies when using Auto ISO.

Feb 20, 2021 18:27:04   #
Linda From Maine Loc: Yakima, Washington State, home since 2002
 
Some cameras will simply show you on the meter that you are under- or over-exposing by X and will keep the settings you dialed in.

Do controlled tests if unsure.

 
 
Feb 20, 2021 18:30:25   #
CHG_CANON Loc: the Windy City
 
First, it depends on your specific camera model. If you have everything set manual, EC will have nothing to adjust. As Linda mentions, test you specific model, either how it responds or what the manual says about EC adjustments in manual exposure mode.

But, if you have a more modern high-end model, if you reset the ISO to AUTO-ISO, you can use EC to advise the camera the exposure to maintain via ISO for any adjustments you make to the aperture or shutter. This is amazingly handy for manual, say BIF, where you have the exposure "correct", say at +2 over the 0-mark for birds against a clear blue sky. Now, if you adjust the shutter for faster or slower speed, the camera responds by adjusting the ISO to keep the exposure at EC +2. In the future, we'll begin to call the True Professional Mode.

Feb 20, 2021 18:39:39   #
Old Coot
 
Thanks for the responses. I was just curious and now I know

Feb 20, 2021 19:14:16   #
lukevaliant Loc: gloucester city,n. j.
 
CHG_CANON wrote:
First, it depends on your specific camera model. If you have everything set manual, EC will have nothing to adjust. As Linda mentions, test you specific model, either how it responds or what the manual says about EC adjustments in manual exposure mode.

But, if you have a more modern high-end model, if you reset the ISO to AUTO-ISO, you can use EC to advise the camera the exposure to maintain via ISO for any adjustments you make to the aperture or shutter. This is amazingly handy for manual, say BIF, where you have the exposure "correct", say at +2 over the 0-mark for birds against a clear blue sky. Now, if you adjust the shutter for faster or slower speed, the camera responds by adjusting the ISO to keep the exposure at EC +2. In the future, we'll begin to call the True Professional Mode.
First, it depends on your specific camera model. I... (show quote)


i just learned something too,thanks chg

Feb 20, 2021 19:53:28   #
BebuLamar
 
Old Coot wrote:
Having set up your camera to take photo using Manual mode, ie set aperture, set time, set iso. What is altered or changed when you apply Exposure compensation


For the Canon it won't let you do it.
For the Nikon it simply bias the meter reading.

 
 
Feb 20, 2021 23:07:38   #
Wallen
 
From Nikon; "Exposure compensation is used to alter exposure from the value selected by the camera, making photographs brighter or darker.

In modes P, S, and A, the camera automatically adjusts settings for optimal exposure, but this may not always produce the exposure the photographer intended. Exposure is a matter of personal preference, and an exposure brighter or darker than that selected by the camera may sometimes better reflect the photographer's intent. The feature used in such situations is called exposure compensation."

Choosing a priority (A, S & P mode) allow the operator control and keep what priority was chosen while the camera decides what the other adjustments needs to be in accordance to its metering. Example; If I'm set at "A" (Aperture priority), the camera will will keep the Aperture at my selected value and automatically adjust the other settings in accordance to the metering value.
Exposure compensation allows the user to control the cameras automatically chosen setting to be brighter or darker depending on how much more + or less -compensation is chosen.

In Aperture priority, the camera will maintain the aperture setting and adjusting either/or both shutter speed and the ISO. In S mode, either/or both the aperture & ISO will be adjusted.

Hence it only works for A, P & S and not in M mode.

Feb 21, 2021 04:22:39   #
User ID
 
Old Coot wrote:
Having set up your camera to take photo using Manual mode, ie set aperture, set time, set iso. What is altered or changed when you apply Exposure compensation

In most cameras, nothing.

Since I work in M-mode, I kinda resent the top deck space wasted by a “highly accessible” EC dial. If I could reassign it to some other purpose I’d like that !

+++++++++++++++++++++++

I find that I can put the EC dial to use in a “back door” version of M-mode. I set the AE lock (AEL) button to “Toggle”. This freezes the P-mode exposure settings, just like in M-mode, but now the EC dial becomes usable. I tend to use it for manual bracketing.

P+AEL=M+EC, via the AEL toggle option. Some brands call it “toggle” and some call it “hold”. But if your brand doesn’t call it anything at all, sorry, bad brand, ditch and switch !

The above work around will not work with Olympus if you are using BBF. An Olympus has no AEL button if it’s set up for BBF :-(

Feb 21, 2021 07:29:54   #
PattyW60 Loc: Northwest Illinois
 
CHG_CANON wrote:
First, it depends on your specific camera model. If you have everything set manual, EC will have nothing to adjust. As Linda mentions, test you specific model, either how it responds or what the manual says about EC adjustments in manual exposure mode.

But, if you have a more modern high-end model, if you reset the ISO to AUTO-ISO, you can use EC to advise the camera the exposure to maintain via ISO for any adjustments you make to the aperture or shutter. This is amazingly handy for manual, say BIF, where you have the exposure "correct", say at +2 over the 0-mark for birds against a clear blue sky. Now, if you adjust the shutter for faster or slower speed, the camera responds by adjusting the ISO to keep the exposure at EC +2. In the future, we'll begin to call the True Professional Mode.
First, it depends on your specific camera model. I... (show quote)


Interesting technique....I haven't tried AUTO-ISO. I'm finally learning to work with Manual settings, rather than my usual Aperture Priority. I shoot a lot of birds, and now with the bright snow and trees, quickly getting the proper exposure can be tricky. This might just be the thing to help. Thanks for the tip.

Feb 21, 2021 07:34:14   #
CHG_CANON Loc: the Windy City
 
PattyW60 wrote:
Interesting technique....I haven't tried AUTO-ISO. I'm finally learning to work with Manual settings, rather than my usual Aperture Priority. I shoot a lot of birds, and now with the bright snow and trees, quickly getting the proper exposure can be tricky. This might just be the thing to help. Thanks for the tip.


Your EOS 5DIV is one of these new EOS cameras where EC can be applied in manual when using AUTO-ISO. In older models, AUTO-ISO would hold the exposure to the 0-mark. Now, EC lets you position / maintain the exposure to an offset of the 0-mark, like could only previous been done for P / AV / TV.

 
 
Feb 21, 2021 07:37:18   #
billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
 
Old Coot wrote:
Having set up your camera to take photo using Manual mode, ie set aperture, set time, set iso. What is altered or changed when you apply Exposure compensation


If you are shooting in Manual everything, EC will not effect your image. EC will change exposures in A,S, and P provided you not using auto iso, on most camera's. There are exceptions however.

Feb 21, 2021 07:38:11   #
yssirk123 Loc: New Jersey
 
www.nikonusa.com: How to set the Auto ISO
The Auto ISO setting can be found in the shooting options menu of newer Nikon digital cameras.

Manual Mode
In Manual mode, the aperture and shutter speed values are fixed by the user. ISO Auto will change the ISO when the light levels change.

*When using the ISO Auto function in manual exposure mode the electronic analog exposure display of the camera will continue to indicate correct shutter speed and aperture settings when light levels change within a four-stop range. The ISO Auto system increases or decreases the ISO value to maintain the correct shutter speed and aperture value the user has chosen.

Feb 21, 2021 07:45:41   #
bikerguy
 
"The above work around will not work with Olympus if you are using BBF. An Olympus has no AEL button if it’s set up for BBF :-("

It doesn't need to work with Olympus with BFF. In manual mode with auto ISO EC adjusts the ISO up to the upper limit that is user set and down to the lowest ISO available.

Feb 21, 2021 08:08:33   #
PattyW60 Loc: Northwest Illinois
 
CHG_CANON wrote:
Your EOS 5DIV is one of these new EOS cameras where EC can be applied in manual when using AUTO-ISO. In older models, AUTO-ISO would hold the exposure to the 0-mark. Now, EC lets you position / maintain the exposure to an offset of the 0-mark, like could only previous been done for P / AV / TV.


That's great! Thank you again, Paul! I didn't think it would work on my 7DII, but I haven't tried on my 5DIV. I appreciate the advice.
Patty

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