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Message: <blockquote data-quote="Eye-level" data-source="post: 126316" data-attributes="member: 6548">In a dojo the light will likely meter around 8-10 EV just like in most indoor rooms running on lamps.  Sunny 16 rule of thumb if you set the ISO at 800 which the D7K will do no sweat dictates f16 @ 800...EV is 15.  We need to get down to EV 8-10 so we need 5-7 stops.  SO we take a few from the aperture and bring that to f5.6 gives us 3 stops then we take say 3 more from the shutter which gives us f5.6 @ 100.  Well above the rule of thumb for anything shorter than say a 180.  Use any 1.8 lens and you'll have even more room.  The range is crucially important to the subject...</blockquote>