Canon Community Canon Community
 


Reply
New Contributor
Posts: 3
Registered: ‎01-02-2019
Accepted Solution

Spot metering on the 7D Mark II

[ Edited ]

I owned a 7D 1 for over 8 years and it recently was stolen out of my car. My insurance came good with a replacement 7D Mark II, and now I am learning the differences between the models.

One difference I've been noticing is the way spot metering behaves, it seems to be very hit and miss as to whether it gets the exposure rightor not.

Some images with EXIF data to show what I mean.

 

#1

Camera Model: Canon EOS 7D Mark II
Shooting Mode: Aperture-Priority AE
Tv(Shutter Speed): 1/800
Av(Aperture Value): 4.0
Metering Mode: Evaluative Metering
Exposure Compensation: 0
ISO Speed: 100
Auto ISO Speed: OFF
Lens: Sigma 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary 013
Focal Length: 41.0mm
FE lock: OFF
White Balance Mode: Auto
AF Mode: One-Shot AF
AF area select mode: Manual selection
Drive Mode: Single shooting

 

Yellow Evaluative.jpg

 

#2

Camera Model: Canon EOS 7D Mark II
Shooting Mode: Aperture-Priority AE
Tv(Shutter Speed): 1/8000
Av(Aperture Value): 4.0
Metering Mode: Spot Metering
Exposure Compensation: 0
ISO Speed: 100
Auto ISO Speed: OFF
Lens: Sigma 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary 013
Focal Length: 41.0mm
FE lock: OFF
White Balance Mode: Auto
AF Mode One-Shot AF
AF area select mode: Manual selection
Drive Mode Single shooting

 

Yellow Spot.jpg

 

#3

Camera Model: Canon EOS 7D Mark II
Shooting Mode: Aperture-Priority AE
Tv(Shutter Speed): 1/400
Av(Aperture Value): 4.0
Metering Mode: Evaluative Metering
Exposure Compensation: 0
ISO Speed: 100
Auto ISO Speed: OFF
Lens: Sigma 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary 013
Focal Length: 41.0mm
FE lock: OFF
White Balance Mode: Auto
AF Mode: One-Shot AF
AF area select mode: Manual selection
Drive Mode: Single shooting

 

Aga Evaluative.jpg

 

#4

Camera Mode:l Canon EOS 7D Mark II
Firmware: Firmware Version 1.1.2
Shooting Mode: Aperture-Priority AE
Tv(Shutter Speed): 1/500
Av(Aperture Value): 4.0
Metering Mode: Spot Metering
Exposure Compensation: 0
ISO Speed: 100
Auto ISO Speed: OFF
Lens; Sigma 17-70mm F2.8-4 DC MACRO OS HSM | Contemporary 013
Focal Length: 41.0mm
FE lock: OFF
White Balance Mode: Auto
AF Mode: One-Shot AF
AF area select mode: Manual selection
Drive Mode: Single shooting

 

Aga Spot.jpg

 

 

Esteemed Contributor
Posts: 3,234
Registered: ‎02-17-2016

Re: Spot metering on the 7D Mark II

What do you expect? If you spot-meter on a light colored flower it will make it 18% grey.

VIP
Posts: 10,937
Registered: ‎12-07-2012

Re: Spot metering on the 7D Mark II

You have too many variables to have any meaning. Not to mention spot vs evaluative.

EOS 1DX and 1D Mk IV, even less and less other stuff.
New Contributor
Posts: 3
Registered: ‎01-02-2019

Re: Spot metering on the 7D Mark II


@kvbarkley wrote:

What do you expect? If you spot-meter on a light colored flower it will make it 18% grey.


Nice friendly answer, thank you.

I was more concerned about the fact that it seemed under exposed and the other shot was well exposed. I would like to know the reasoning behind this to help me make better choices in my settings.

Esteemed Contributor
Posts: 3,234
Registered: ‎02-17-2016

Re: Spot metering on the 7D Mark II

meter.jpg

 

These are descriptions from your 7DII manual.

 

With the exception of the evaluative metering, which has more automagical smarts, all the rest of these will set the exposure such that the area in the exposure area will look like an 18% grey card. In spot metering, which only evaluates exposure in the 1.8% area of the viewfinder as shown above, it will set the exposure to make what is in the circle look like 18% grey. Shoot a polar bear in a snowstorm? Grey. Shoot a black cat in a coal mine? Grey. (As an experiment, use spot metering, press the shutter half-way and point at various objects. You can see the exposure vary.)

 

In your two images above the light colored flower in the spot zone yielded an exposure that made the flower grey. In the evaluative case, the camera took the whole image into account and yielded a correct exposure. The purple flower must have had a monochrome value close to 18% grey because the exposure of both spot and evaluative are pretty close.

 

Spot metering is really only for specialized uses and evaluative metering should generally be used. I would only use spot metering if I had a WhiBal (or equivalent) and wanted consistent exposures over a wide variety of lighting.

New Contributor
Posts: 3
Registered: ‎01-02-2019

Re: Spot metering on the 7D Mark II

Thank you, a very detailed explanation, just what I was looking for.

Highlighted
Esteemed Contributor
Posts: 3,234
Registered: ‎02-17-2016

Re: Spot metering on the 7D Mark II

And just for the record, I am sure your 7D worked exactly the same way.

powered by Lithium

LIKE US on Facebook FOLLOW US on Twitter WATCH US on YouTube CONNECT WITH US on Linkedin WATCH US on Vimeo FOLLOW US on Instagram SHOP CANON at the Canon Online Store
© Canon U.S.A., Inc.   |    Terms of Use   |    Privacy Statement