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<blockquote data-quote="WayneF" data-source="post: 200545" data-attributes="member: 12496">Thanks, that is a real surprise to me.&nbsp;&nbsp; D5100 dates to April 2011, and D7000 to Sept 2010, both relatively older than the current models. But your results show they are of the current class of Auto ISO behavior.1. Old CLS DSLR (D300, D90, etc):&nbsp; &nbsp; Your flash ISO would have remained at minimum, ISO 200 in those days for almost all.2. Intermediate date models (starting with D300S, July 2009)&nbsp;&nbsp; Flash ISO would have remained at the high value metered with no flash, regardless of flash.3. Current models (D800, D600, D7100).&nbsp;&nbsp; Flash ISO would increase only two stops, to ISO 400.&nbsp; And ISO 400 is about right for bounce flash.Clearly your two are the latter current version, which obviously goes back farther than I was aware.&nbsp;&nbsp; I guess that may be reasonable, we heard many complaints about indoor ISO being absurdly high when we were using flash, but I guess no one complains when it was fixed.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />Thanks much.FWIW...&nbsp; different subject, but &quot;Minimum Shutter Speed&quot; in the Auto ISO menu is NOT a minimum shutter speed, not exactly.&nbsp;&nbsp; It is the threshold shutter speed that must be reached before Auto ISO will be increased.&nbsp; Then it does hang at that minimum, (insuring it will use that specified shutter speed, so to speak), but when Auto ISO hits its Maximum, then shutter speed must go lower, as necessary for the exposure.</blockquote>

[QUOTE="WayneF, post: 200545, member: 12496"] Thanks, that is a real surprise to me. D5100 dates to April 2011, and D7000 to Sept 2010, both relatively older than the current models. But your results show they are of the current class of Auto ISO behavior. 1. Old CLS DSLR (D300, D90, etc): Your flash ISO would have remained at minimum, ISO 200 in those days for almost all. 2. Intermediate date models (starting with D300S, July 2009) Flash ISO would have remained at the high value metered with no flash, regardless of flash. 3. Current models (D800, D600, D7100). Flash ISO would increase only two stops, to ISO 400. And ISO 400 is about right for bounce flash. Clearly your two are the latter current version, which obviously goes back farther than I was aware. I guess that may be reasonable, we heard many complaints about indoor ISO being absurdly high when we were using flash, but I guess no one complains when it was fixed. :) Thanks much. FWIW... different subject, but "Minimum Shutter Speed" in the Auto ISO menu is NOT a minimum shutter speed, not exactly. It is the threshold shutter speed that must be reached before Auto ISO will be increased. Then it does hang at that minimum, (insuring it will use that specified shutter speed, so to speak), but when Auto ISO hits its Maximum, then shutter speed must go lower, as necessary for the exposure. [/QUOTE]

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