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Author Topic: What is exposure bracketing?  (Read 5222 times)
RMichael
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« on: May 21, 2007, 02:12:26 PM »
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Hi

I have heard this term often in connection with usage in difficult lighting situations. I need to understand :

1. What is exposure bracketing and how does it work?

2. What broad description of 'difficult lighting' will require exposure bracketing?

3. How is exposure bracketing different from metering?





Thanks and Regards
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howiesmith
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« Reply #1 on: May 21, 2007, 03:30:25 PM »
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What is bracketing.  It is changing the exposure up and/or down to get several exposures of essentially the same subject with the same lighting.

Difficult lighting is a situation where the photographer and/or meter cannot determine the single best exposure.  Best is the one the photographer wants.  There may be times when the difference between the high values and low values are greater than the camera can record.  I don't think these as really difficult lighting situations as much as lighting situations that are well understood, but require some tradeoffs of alternate solutions to get the print you want.

Metering is measuring the light and determing an exposure value.  The photographer can use a hand held meter or thru-the-lens meter, spot meter averagpng meter or a blend.  Bracketing is taking multiple exposures, sometimes based on a metered value, in the hopes of getting the exposure(s) the photographer wants.

I think of metering like a rifle and bracketing like a shot gun.
« Last Edit: May 21, 2007, 03:51:27 PM by howiesmith » Logged
RMichael
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« Reply #2 on: May 23, 2007, 02:47:22 AM »
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Thanks Howie. Great Help!! I see how you think of them in rifle and shotgun......  One line concept clearer..


Thanks again.

Regards
« Last Edit: May 23, 2007, 02:49:43 AM by RMichael » Logged
feppe
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Oh this shows up in here!


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« Reply #3 on: May 23, 2007, 03:02:22 AM »
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I bracket all the time when doing low-light photography, and whenever there's a lot of dynamic range in the scene - ie. deep shadows and bright highlights. As with shooting digital there's practically no cost in shooting three times as much due to bracketing, so go crazy.

Bracketing can be used for some advanced techniques. Google for digital blending and you'll get to a LL (and other sites') article on one of them. Another one is high dynamic range (HDR) imagery.

Quote
I think of metering like a rifle and bracketing like a shot gun.
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That's excellent
« Last Edit: May 23, 2007, 03:04:22 AM by feppe » Logged

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