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A poll about Auto ISO action with hot shoe TTL flash
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<blockquote data-quote="WayneF" data-source="post: 537668" data-attributes="member: 12496"><p>Yes, I have discovered the problem of describing a failsafe test situation to avoid too close, too far, etc. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> One concern is that not all flashes are the same power level.</p><p></p><p></p><p></p><p>I always assumed FP here referred to Focal Plane shutter sync issues. Same name and purpose as the FP sync flash bulbs we used in the good old days. At least we thought it was fun then. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> </p><p>I didn't follow this part though. In camera modes A and P, the 1/60 second shutter we see indoors is the default Minimum Shutter Speed With Flash (E2 menu on some), seen in dim ambient, and this Minimum shutter speed is not likely to show up outdoors in sunlight (unless unusually high fstop or unusually low ISO, maybe). The only way to get a faster shutter with flash in A mode is to go out into brighter ambient. That higher shutter speed answer indoors is camera M mode. We can set the same aperture, and can set any usable shutter speed of our choice, and (again, speaking indoors in dim ambient), it will do anything camera A mode can do.</p><p></p><p>The FP 1/320 is not a shutter setting, instead it describes the threshold when, if the actual shutter speed is higher than this, the flash will shift into FP HSS mode. That does change the game, and gives shutter speed importance in the flash exposure. </p><p></p><p>FWIW, the nasty trouble that I know about is Auto FP in camera A mode in outdoor fill flash situations and settings when the shutter speed can vary slightly either side of this 1/320 threshold. Then one flash shot to the next of same thing can vary EXTREMELY. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>So that is one plus of camera P mode. It will allow forced HSS, but its automation will first use the absolute highest possible f/stop before it will allow switching into automatic HSS action.</p></blockquote><p></p>
[QUOTE="WayneF, post: 537668, member: 12496"] Yes, I have discovered the problem of describing a failsafe test situation to avoid too close, too far, etc. :) One concern is that not all flashes are the same power level. I always assumed FP here referred to Focal Plane shutter sync issues. Same name and purpose as the FP sync flash bulbs we used in the good old days. At least we thought it was fun then. :) I didn't follow this part though. In camera modes A and P, the 1/60 second shutter we see indoors is the default Minimum Shutter Speed With Flash (E2 menu on some), seen in dim ambient, and this Minimum shutter speed is not likely to show up outdoors in sunlight (unless unusually high fstop or unusually low ISO, maybe). The only way to get a faster shutter with flash in A mode is to go out into brighter ambient. That higher shutter speed answer indoors is camera M mode. We can set the same aperture, and can set any usable shutter speed of our choice, and (again, speaking indoors in dim ambient), it will do anything camera A mode can do. The FP 1/320 is not a shutter setting, instead it describes the threshold when, if the actual shutter speed is higher than this, the flash will shift into FP HSS mode. That does change the game, and gives shutter speed importance in the flash exposure. FWIW, the nasty trouble that I know about is Auto FP in camera A mode in outdoor fill flash situations and settings when the shutter speed can vary slightly either side of this 1/320 threshold. Then one flash shot to the next of same thing can vary EXTREMELY. :) So that is one plus of camera P mode. It will allow forced HSS, but its automation will first use the absolute highest possible f/stop before it will allow switching into automatic HSS action. [/QUOTE]
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A poll about Auto ISO action with hot shoe TTL flash
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