m_a1

<p>Sorry for not responding sooner - I was shooting in manual mode, A, S and was getting the fluttering exposure, even when I set Auto ISO sensitivity off. However, the combination of these settings eliminated the fluttering exposure entirely:<br /><br />(1) I turned off Auto ISO sensitivity<br />(2) I switched to center-weighted metering<br />(3) I assigned the AE-L/AF-L button to AE Lock (Hold)<br />(4) I turned the shutter release button AE-L ON.</p>

<p>Michael, thanks I'll take a look at the workaround. Matthew, it does have AE lock - if I can't lock down the exposure with the settings I'll try seeing if it locks down with AE-L. Thanks!</p>

Well, the titles says it all. I am shooting video of an individual in front of a white wall lit with softboxes to create an infinite white background effect. The exposure fluctuates sometimes when there is movement - hands coming up into the frame, the person shifting position. The fluctuation causes the person's face to be underexposed, sometimes dramatically, for several seconds until the camera adjusts. This happens in auto mode as well as in manual mode with auto iso turned off. I have focusing set to face priority.<br /><br />When the person is wearing dark clothes (ie high contrast) the fluctuations are nearly constant and the subject has to stay practically still to prevent them.<br /><br />Is there a way to eliminate the exposure fluctuations?