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tests done for max flash power -SB900 SB700 yongnuo 560III
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<blockquote data-quote="WayneF" data-source="post: 316388" data-attributes="member: 12496"><p>Maybe not, but this actually seems one case when the words are better than a picture. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> There are many words the picture could not show.</p><p></p><p>As you are probably aware, incident meters are aimed away from the subject... aimed at the light (or camera) from subjects position, and they meter the actual light level incident on the subject. This is independent of the subject, and is only about the flash power reaching the subject.</p><p></p><p>This is in contrast to reflected meters which are aimed at the subject, and meter the light reflected from the subject, such as it can be reflected. The subject introduces variables which trouble our exposure.</p><p></p><p>Rocketman explained his setup, with the light meter attached to a fixed stand aimed at the flash. He said meter was ISO 100 and flash was full power and 35mm zoom. Actually, I realize now he did explain that the meter was exactly one meter from the flash, and somehow I had missed that. So now I wonder why the SB-900 did not meter f/34 and the SB-700 did not meter f/28? (expected from Guide Number table). Something is still unexplained, something is not as expected.</p><p>But otherwise, this meter reading should be the correct camera settings (ISO and aperture) to take a flash picture of any subject at the same light meter position and distance, in that situation, with that flash power at same location. Just how flash meters work.</p><p></p><p>Other than settings, that procedure seems very straight forward, I don't know what a picture could add. You put the meter in front of the flash, and trigger the flash. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="WayneF, post: 316388, member: 12496"] Maybe not, but this actually seems one case when the words are better than a picture. :) There are many words the picture could not show. As you are probably aware, incident meters are aimed away from the subject... aimed at the light (or camera) from subjects position, and they meter the actual light level incident on the subject. This is independent of the subject, and is only about the flash power reaching the subject. This is in contrast to reflected meters which are aimed at the subject, and meter the light reflected from the subject, such as it can be reflected. The subject introduces variables which trouble our exposure. Rocketman explained his setup, with the light meter attached to a fixed stand aimed at the flash. He said meter was ISO 100 and flash was full power and 35mm zoom. Actually, I realize now he did explain that the meter was exactly one meter from the flash, and somehow I had missed that. So now I wonder why the SB-900 did not meter f/34 and the SB-700 did not meter f/28? (expected from Guide Number table). Something is still unexplained, something is not as expected. But otherwise, this meter reading should be the correct camera settings (ISO and aperture) to take a flash picture of any subject at the same light meter position and distance, in that situation, with that flash power at same location. Just how flash meters work. Other than settings, that procedure seems very straight forward, I don't know what a picture could add. You put the meter in front of the flash, and trigger the flash. :) [/QUOTE]
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tests done for max flash power -SB900 SB700 yongnuo 560III
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