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General photography questions and answers: Discuss AEB Advise...Hi all - I'm gradually getting to grips with my 20D's features, but am a little confused about auto exposure ...
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Old 13-03-2010, 23:57   #1 (permalink)
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Question AEB Advise

Hi all - I'm gradually getting to grips with my 20D's features, but am a little confused about auto exposure bracketing, and was wondering if anyone can clear up a couple of things for me please.

Firstly would I be right to assume that this feature allows me the benefit of the doubt, if for example I'm unsure about the conditions i'm shooting in, and don't trust my camera meter.

Also my instruction book states that I can bracket + or - 2 stops in incriments of 1/3. Do the 1/3 incriments mean shutter speed or aperture values depending on what setting i'm shooting in.

Hope you can help

Regards

Daz
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Old 14-03-2010, 08:05   #2 (permalink)
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Re: AEB Advise

Quote:
Originally Posted by Daggensan View Post
Firstly would I be right to assume that this feature allows me the benefit of the doubt, if for example I'm unsure about the conditions i'm shooting in, and don't trust my camera meter.
Yup, meter can be fooled by shooting conditions i.e. snow, when you can need +1.0-2.0

Also used for increasing the Dynamic Resolution of the image and blending a number of images together. Some choose to use HDR software to achieve this.

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Originally Posted by Daggensan View Post
Also my instruction book states that I can bracket + or - 2 stops in incriments of 1/3. Do the 1/3 incriments mean shutter speed or aperture values depending on what setting i'm shooting in.
Depending on the setting of your camera (i.e. AV or TV) depends on whether the aperture or shutter speed is adjusted - if in one of the program modes I'd expect the adjustment to occur in the most logical area (i.e. sport would be aperture)
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Old 14-03-2010, 23:12   #3 (permalink)
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Re: AEB Advise

If you are using bracketing to combine images either manually or using HDR software to capture a large dynamic range you must use either AV or manual so that the aperture is fixed. Changing the aperture will change the depth of field thus making it difficult to align and combine multiple images. I have used this feature on my 20D for many years.

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Old 17-03-2010, 01:11   #4 (permalink)
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Re: AEB Advise

Thanks for the advice guys, much appreciated.
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