Pro Cam locks out EV control when using manual ISO and Shutter

fc000

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Nov 29, 2010
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Has anyone found a way to stop the Pro Camera app from locking out the EV control dial when using manual ISO and shutter? It seems pretty pointless being able to tweak exactly what you want, only to have the app override the last setting, messing up your shot.
 

JaimitoFrog

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that's normal. there's no point having a EV preset if you are manually adjusting iso and shutter speed. the f stop on the phone is fixed.

you have read a bit on basics of photography. any basic books on exposure or online will help. Digital Photography and Exposure - For Dummies

the holy trinity to exposure is ISO, f stop, and shutter speed. EV control dial preset on the phone can only change iso or shutter, since f stop is fixed. so if you are manually adjusting ISO and shutter, you are effectively setting the EV yourself manually.
 

JSRunning

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May 30, 2013
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that's normal. there's no point having a EV preset if you are manually adjusting iso and shutter speed. the f stop on the phone is fixed.

you have read a bit on basics of photography. any basic books on exposure or online will help. Digital Photography and Exposure - For Dummies

the holy trinity to exposure is ISO, f stop, and shutter speed. EV control dial preset on the phone can only change iso or shutter, since f stop is fixed. so if you are manually adjusting ISO and shutter, you are effectively setting the EV yourself manually.

This is well put, but to explain further..... The point of the EV (exposure compensation) is to give you the ability to make an adjustment to the exposure setting after it has been automatically calculated by the camera. You're basically saying, "Okay camera, figure out the best exposure settings for the scene I'm shooting. But then afterward, bump it up (or down) a stop because I want this photo to be brighter than you think it should be." This can only happen if there is at least ONE setting that the camera is calculating automatically.

A perfect example of when you would want to use EV when shooting is when you shoot in snowy conditions. Since the camera will attempt to automatically calculate the exposure of the photo for a neutral tone (specifically, 18% gray), the camera will set the exposure too dark, making the bright white snow a dull gray. You would bump up the EV one or two stops, telling the camera, "I know this scene is supposed to be brighter than you think it should be because I'm a human and I'm smarter than you."
 

fc000

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Thanks guys, these are fantastic explanations of the EV setting.

What threw me off about the EV slider when manually setting your ISO and shutter speed in Pro Cam, was the EV slider seemed to shift often depending on what you aimed the camera at. My best guess after feeding it values that would either burn out the image, or appear too dark, is that the app is giving the user feedback on their settings with this slider, stating whether it'll be under, or over exposed.
 

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