Shooting in Aperture Priority

[MT0227]

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Hi there....I shoot in AP mode and understand the F-Stop meta data is an "estimate".   I can't recall if the corresponding Shutter Speed is the speed the camera actually fired, or an estimate based on the corresponding F-Stop "estimate".   I've also noticed that the darker the scene, the further off the F-Stop  "estimate" is from the actual.

Here's a frame I shot last evening, the meta data shows -   ISO: 400  Shutter: 1/12  Aperture:  f/13.  The actual Aperture was f/4, ISO was 400.  

M11-P | 35APO

 

 

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[Warton]

Aperture: estimated value.

Shutter: actually fired.

ISO: actually fired.

Always like this no matter what shooting mode (A, or M) you use.

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[kivis]

correct

[MT0227]

2 hours ago, Warton said:

Aperture: estimated value.

Shutter: actually fired.

ISO: actually fired.

Always like this no matter what shooting mode (A, or M) you use.

Got it, just wanted to confirm the 1/12 was real.  Thanks