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Aperture/Shutter Priority and EV

DBarnes

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"Aperture/Shutter Priority and EV"

DBarnes Silver Member Nikonian since 25th Oct 2008
Tue 11-Sep-12 05:51 PM

Isn't fall/going back to school the time when we talk about what we did on our summer vacation?
I spent the summer working on landscapes (taken on tripod). I learned and started practicing the idea of pushing a histogram as far to the right as possible to make for details in the shadows of the final photos. To accomplish this I was trying to shoot using Aperture Priority at f11 and then using the main command dial to raise or lower shutter speed to get the histogram pushed to the right. (I'm liking the final photos once I've adjusted them in Lightroom 4 because there's more detail available in the shadows.)
Now, here's the big revelation (lightbulb/ahaa moment) for me this weekend... I thought I was pushing the histogram to the right by changing shutter speed.
After all that... here's the question(s)... in reality, I'm changing EV? Is that right? or am I changing shutter speed AND EV? Is it a compounded move? or can the two be separated... EV and Shutter speed?
Through some experimentation, I've found that to shoot in Shutter priority, the reverse happens... to push the histogram right, the Aperture moves as well as EV.
BUT, in MANUAL mode, the EV is separate. What is it that the EV does when not changing shutter speed or aperture? Computer wizardry and magic? Does it add more noise?
Can someone please help me confirm/deny or straighten out these mutterings?
Thanks as always for your help!
Dave
PS... one of my real concerns is not always being aware that the EV has been set as a pick up the camera for a quick shot and I lose the shot because the EV got in the way.

http://fullframedreams.smugmug.com/

This is a hot, active topic! Aperture/Shutter Priority and EV [View all] , DBarnes Silver Member, Tue 11-Sep-12 05:51 PM
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