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<blockquote data-quote="Revet" data-source="post: 229378" data-attributes="member: 17612">I love the Four Flash Fundamentals We Must Know.&nbsp; Maybe I should be starting a new post but there is a statement in there that is confusing.&nbsp; In the converting guide number for iso section, the following statement is made, &quot; Doubling ISO doubles distance range, or doubles f/stop number, which is two more stops&quot;.&nbsp; That [FONT=verdana, sans-serif]contradicts[/FONT] everything else I learned concerning exposure or flash.&nbsp; I agree that two stops is doubling the distance, but isn't that also two stops on the ISO&nbsp; (ie. 200 to 800)?&nbsp; Doubling the ISO to me means going from 200 to 400, which I thought is one stop which would not be the same as doubling the distance (which is two stops)?&nbsp; Where am I going wrong here??</blockquote>

[QUOTE="Revet, post: 229378, member: 17612"] I love the Four Flash Fundamentals We Must Know. Maybe I should be starting a new post but there is a statement in there that is confusing. In the converting guide number for iso section, the following statement is made, " [COLOR=#000000][FONT=verdana]Doubling ISO doubles distance range, or doubles f/stop number, which is two more stops". That [/FONT][/COLOR][FONT=verdana, sans-serif][SIZE=3][COLOR=#000000]contradicts[/COLOR][/SIZE][/FONT][COLOR=#000000][FONT=verdana] everything else I learned concerning exposure or flash. I agree that two stops is doubling the distance, but isn't that also two stops on the ISO (ie. 200 to 800)? Doubling the ISO to me means going from 200 to 400, which I thought is one stop which would not be the same as doubling the distance (which is two stops)? Where am I going wrong here??[/FONT][/COLOR] [/QUOTE]

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