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07/21/2008 01:45:25 PM · #1 |
HI guys!
I'm back with a new tutorial! This time I'll explain the ins and outs of an often overlooked button on our camera: the EV compensation button. I explain what it is, how it works and when I use it.
Check it out HERE.
Have a great week!
Yanik
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07/21/2008 01:54:03 PM · #2 |
This looks good. I plan to read it more closely later.
I'm curious, though, if you shoot in RAW, can't you adjust EC later (in post-processing)?
Also, how does focal length (400mm) affect other paramters? Is blur from hand shake more likely at 400mm? |
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07/21/2008 01:54:51 PM · #3 |
| Thanks for sharing that, it was very informative! |
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07/21/2008 02:52:43 PM · #4 |
A nice introductory guide.
One constructive comment I have would be to slightly update your note:
"NB: You cannot use the EV button to under or overexpose your photo in M (manual) mode since you control both the shutter speed and aperture manually."
While strictly-speaking, this is true, but it leads the reader to think the EV comp button may not serve a purpose in M mode. In Manual mode, EV comp actually changes what your viewfinder exposure meter displays as optimal exposure. (i.e. if you meter a scene in M mode for what your meter shows as optimal exposure, then adjust EV comp -1.0, your exposure meter will now display your settings are +1.0 overexposed, prompting you to adjust shutter and/or aperture so that you expose down 1.0 EV to match your desired EV comp).
A better definition (which would also work for Manual mode) might be that EV comp will offset what your meter "thinks" is optimal exposure by the EV offset you select.
Another tip/trick you might add is what I like to call "assisted manual mode". Available on most Nikon DSLRs with two control wheels (and I would assume Canon has a similar feature), you can select "Exposure Compensation" in CSM and turn it "On", then the unused command dial in S or A mode will now be EV comp. Then, you can shoot in S or A as usual, but you can easily adjust EV comp using the other/unused command dial, which essentially turns S or A mode into a meter-assisted manual mode, where you still have access to adjust aperture and shutter speed via the command dials, but depending upon which mode you choose, the camera will help adjust one or the other for you. Or, you can simply look at is a way to adjust EV comp without having to hit the "+/-" button.
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07/21/2008 04:41:04 PM · #5 |
Originally posted by bvy:
I'm curious, though, if you shoot in RAW, can't you adjust EC later (in post-processing)?
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Yes and no... You can "adjust exposure" in PP, but it is working from the actual exposure recorded by the camera. Using EC changes the actual exposure the camera uses, more or less exposure is given and that's your baseline.
R.
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07/22/2008 07:14:51 AM · #6 |
cdrice,
this functionality would probably depend on the camera. On a Pentax K10d, when in manual mode the EV comp does nothing, as you are in total control over how to expose the shot, meaning you need to Manually set the exposure up or down depending on desire. In the other Program modes, then it functions as described. |
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07/22/2008 09:36:58 PM · #7 |
Originally posted by barley:
cdrice,
this functionality would probably depend on the camera. On a Pentax K10d, when in manual mode the EV comp does nothing, as you are in total control over how to expose the shot, meaning you need to Manually set the exposure up or down depending on desire. In the other Program modes, then it functions as described. |
Really? I don't own a Pentax K10D, but a quick look in the owner's manual online, and I see it shows what it calls "The EV bar" which "...shows the EV compensation values or difference between the appropriate and current exposure values when Exposure mode is set to M."
Try exactly what I described above -- compose a shot in manual mode with an unchanging subject (so the subject itself doesn't change your metered exposure) -- and set your shutter speed and aperture to match what your camera displays will be optimal exposure (via the "EV bar"). Now change EV comp (say +1.0) and check your EV bar. I expect your EV bar will now show your current settings are 1.0 EV underexposed.
EV comp doesn't *change* anything about how the frame will be exposed in manual mode (as you've both said, in manual mode you are, by definition, in full control of shutter speed and aperture), but it *does* change what your in-viewfinder exposure meter (EV bar, whatever your vendor calls it) will display as optimal exposure. EV comp is, always, an offset to be applied to the camera's meter. In P, S or A mode, that means the camera will choose different settings to achieve what it thinks is optimal exposure, in M mode it will change what the in-viewfinder meter displays is your optimal exposure.
Some of the more "fringe" settings might be different on different cameras, but EV comp is pretty standard... "how EV comp works" is the same way it's always been since the early days of film SLRs...
Message edited by author 2008-07-23 02:06:42. |
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