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<blockquote data-quote="WayneF" data-source="post: 183617" data-attributes="member: 12496">They might get close.&nbsp;&nbsp; SB-800 (about 2/3 stop more power than SB-700) is not 640 watt seconds, but it will do:f/11 + 4/10&nbsp; at four feet from reflected 45&quot; white umbrella fabric at ISO 200.&nbsp; So it should do f/8 + 4/10 at ISO 100, at four feet (main light)f/5.6 + 2/10 at ten feet from reflected white umbrella fabric at ISO 200 (groups... how much more is needed for that?)It is not always about power, but the real point is that this is their full power and slow recycle, about 3 seconds waiting for next shot, and then not too many too fast.&nbsp; It may matter to some, and not to others.The bigger lights (some of them) can shoot much faster, a couple per second easy, or about as fast as you can go... and are fan cooled, without maximum number specifications.&nbsp; This part is a day and night difference.</blockquote>

[QUOTE="WayneF, post: 183617, member: 12496"] They might get close. SB-800 (about 2/3 stop more power than SB-700) is not 640 watt seconds, but it will do: f/11 + 4/10 at four feet from reflected 45" white umbrella fabric at ISO 200. So it should do f/8 + 4/10 at ISO 100, at four feet (main light) f/5.6 + 2/10 at ten feet from reflected white umbrella fabric at ISO 200 (groups... how much more is needed for that?) It is not always about power, but the real point is that this is their full power and slow recycle, about 3 seconds waiting for next shot, and then not too many too fast. It may matter to some, and not to others. The bigger lights (some of them) can shoot much faster, a couple per second easy, or about as fast as you can go... and are fan cooled, without maximum number specifications. This part is a day and night difference. [/QUOTE]

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