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AE lock is on when depth of field button is pushed

km6xz

St Petersburg, RU
3559 posts

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"RE: AE lock is on when depth of field button is pushed"

km6xz Moderator Awarded for his in-depth knowledge in various areas, including Portraits and Urban Photography Nikonian since 22nd Jan 2009
Mon 08-Oct-12 07:08 AM

The AE L appears normally as you would want it. Whatever the metering is at the time of pressing Preview, locks, so when you release it, it goes back to how you had metered before pressing the button. Preview works by allowing you to see what the scene would look like if the aperture was stopped down for taking the shot, the only time the VF gets the stopped down view, so DOF can be seen. For all other functions, prior to the shutter being triggered, the metering, VF and Focus sensors only see the wide open aperture. That is why "fast" 1.4 lenses, even when stopped down, usually focus faster and give brighter VF images. If metering followed the aperture setting, the light level reaching the metering Sensor, and the Focus sensor would be lower so neither would work as well.
The AE-L indicator should appear only when you have the preview button pressed.
Stan
St Petersburg Russia

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A topic tagged as having a question AE lock is on when depth of field button is pushed [View all] , mickeyb48 Silver Member , Mon 08-Oct-12 12:48 AM
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