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Light meter questions
If I focus on something, I press the shutter halfway down to get the right exposure and then all the way down to take the picture. If the light meter say that the right exposure is say f/8 and shutter speed 1/125, would it be possible to then stop down the aperture and stop up the speed or vice versa and still get a technically correct exposure?..

Comments (7)

Yes, more or less..

Taking a picture is like taking a bath. Open the tap more (wider f stop) and you don't have to leave the water running as long (use a shorter/faster shutter speed..

Depending on the camera, this is easy or hard to do..

1/125 at f8 is the same as 1/60 at f 11 and 1/250 at f5.6..

BAK..

Comment #1

Linslus wrote:.

If I focus on something, I press the shutter halfway down to get theright exposure and then all the way down to take the picture. If thelight meter say that the right exposure is say f/8 and shutter speed1/125, would it be possible to then stop down the aperture and stopup the speed or vice versa and still get a technically correctexposure?..

Comment #2

BAK wrote:.

Yes, more or less..

Taking a picture is like taking a bath. Open the tap more (wider fstop) and you don't have to leave the water running as long (use ashorter/faster shutter speed..

Depending on the camera, this is easy or hard to do..

1/125 at f8 is the same as 1/60 at f 11 and 1/250 at f5.6..

So is there any special reason why the camera's light meter chose 1/125 at f8 instead of 1/60 at f 11? Does this differ between cameras? Would all cameras' light meters have picked 1/125 at f8 as first choice?..

Comment #3

It also depends on the other camera settings. Some settings maximize, shutter speed, others maximize depth of field. The exposure value might differ between cameras depending on the calibration of the light meters and the look of the photo can certainly be different depending on the processing done internally by the camera...

Comment #4

Linslus wrote:.

BAK wrote:.

Yes, more or less..

Taking a picture is like taking a bath. Open the tap more (wider fstop) and you don't have to leave the water running as long (use ashorter/faster shutter speed..

Depending on the camera, this is easy or hard to do..

1/125 at f8 is the same as 1/60 at f 11 and 1/250 at f5.6..

So is there any special reason why the camera's light meter chose1/125 at f8 instead of 1/60 at f 11? Does this differ betweencameras? Would all cameras' light meters have picked 1/125 at f8 asfirst choice?.

I'm not sure, but in that example, I'd guess the faster shutter (1/125 @ f/8) is preferable, so that's why the camera picked it; faster shutter should = sharper pic...

Comment #5

Camera's with a command dial and a program mode usually will allow you to select different values for your shutter and aperture that have the same exposure by rotating the command wheel, giving you more control than a Fully Auto mode..

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window..

Comment #6

Linslus wrote:.

BAK wrote:.

Yes, more or less..

Taking a picture is like taking a bath. Open the tap more (wider fstop) and you don't have to leave the water running as long (use ashorter/faster shutter speed..

Depending on the camera, this is easy or hard to do..

1/125 at f8 is the same as 1/60 at f 11 and 1/250 at f5.6..

So is there any special reason why the camera's light meter chose1/125 at f8 instead of 1/60 at f 11? Does this differ betweencameras? Would all cameras' light meters have picked 1/125 at f8 asfirst choice?.

It is completely a result of that specific cameras "program" mode..

Some cameras offer a choice of "program" modes and each will give a different result. Some will indeed result in a much faster shutter speed, (and wider open lens aperture); while another mode will give a much slower shutter speed with a smaller opening..

Your camera manual SHOULD give an explanation of each mode and what it is designed for. It MAY tell you that one mode will give a faster or slower shutter speed than another; (but may not, some manuals don't think you are intelligent enough to understand)..

Thanks for reading .... JoePhoto.

( Do You Ever STOP to THINK and FORGET to START Again ??? )..

Comment #7

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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