flash and focusing point in 350D -- Canon Digital Cameras in photography-on-the.net forums

Hatchling

7 posts
Joined Sep 2005

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Sep 19, 2005 16:05 | #1

about the ettl II of canon 350d need some help
the canon 350 d take its ambient exposure metering in the evaluative metering through the af points active..
now what about when we use the flash at the same time
did the flash will also bias its metering over the active af point of the ambient metering like the rebel 300d or the evaluative ettl II metering is metering in a different way??..thanks

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Jwreich

Senior Member

440 posts
Joined May 2005

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Sep 20, 2005 06:08 | #2

sambahri wrote:
about the ettl II of canon 350d need some help
the canon 350 d take its ambient exposure metering in the evaluative metering through the af points active..

Humm, I didn't know that. Is that listed in the book somewhere?

sambahri wrote:
now what about when we use the flash at the same time
did the flash will also bias its metering over the active af point of the ambient metering like the rebel 300d or the evaluative ettl II metering is metering in a different way??..thanks

I would think not because my flash appears to work great at adding fill and not blowing out the image.

Can anyone confirm this for us? I have examples of then the flash was a bit strong....

--JWR
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Tamron 28-75 2.8, EF 70-200 L f2.8 IS EF 16-35 L
EF 24-105 L f4 IS, 50mm 1.4, 35 L, 85 1.8, 580EX x4, SB28 x6
www.jessereich.com

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PacAce

Cream of the Crop

26,900 posts
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Joined Feb 2003
Location: Keystone State, USA

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Sep 20, 2005 07:42 | #3

sambahri wrote:
about the ettl II of canon 350d need some help
the canon 350 d take its ambient exposure metering in the evaluative metering through the af points active..
now what about when we use the flash at the same time
did the flash will also bias its metering over the active af point of the ambient metering like the rebel 300d or the evaluative ettl II metering is metering in a different way??..thanks

With ETTL II, flash metering is NOT biases towards the active focusing point. It is biased towards the subject which it tries to determine via some sort of algorithm. The stickies at the top of the "Small Flash and Studio Lighting" forum give a more detailed explanation of how ETTL II works.

...Leo

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