Partial Metering

bcad84 · 28th December 2005

Hi guys,

Can I check with u guys, when i use partial metering, which focusing point does it use to evaluate the surround ar? Is it the focusing point which u have set to example [ -] then the evaluation will take the right?

Thanks.

TMC · 28th December 2005

depending on which focussing pt you have selected.

bcad84 · 28th December 2005

Icic, Let say i have locked the exposures, then i reposition my view a bit, will it change the exposures that i have locked?

I heard in some mode you can't lock the Exposures.

espn · 28th December 2005

Originally Posted by bcad84

Icic, Let say i have locked the exposures, then i reposition my view a bit, will it change the exposures that i have locked?

I heard in some mode you can't lock the Exposures.

If you have locked your exposure, how will repositioning your view change the exposure when it's locked?

I don't know about you, but I'm able to lock exposure on P A S M modes.

bcad84 · 28th December 2005

Icic thanks... i try again...

roti_prata · 30th December 2005

use the afl/ael button instead of holding down the half-press, it only locks focus not exp

d7t3 · 30th December 2005

if you're using canon partial metering, metering should be based on the centre circle no matter which af point is selected. check your camera manual.

Quote:

I heard in some mode you can't lock the Exposures

yes, check manual... the idiotproof modes on some cameras won't allow AE-lock

antitrust · 1st January 2006

okay a newbie question here. Why use an AE-lock instead of letting the camera decide your exposure? so you'd constantly get the same amount of light for like a series of portrait? i'm very curious how to take advantage of this function cos its always found in the most convenient placements on the camera.

ronnie_sjr · 1st January 2006

Originally Posted by antitrust

okay a newbie question here. Why use an AE-lock instead of letting the camera decide your exposure? so you'd constantly get the same amount of light for like a series of portrait? i'm very curious how to take advantage of this function cos its always found in the most convenient placements on the camera.

Well sometimes indeed you can just let the cam decide your exposure, but that's the case when lighting throughout the entire picture is more or less the same. ie flat lighting.

However most of the times this is not the case. Take for example you have one part of the picture very bright and one part very dark. The bright part is your main subject but it happens that it's at one corner of the picture, and the centre is mainly quite dark. If you simply meter straight with your camera your camera will try to compensate for the dark area. What do you get? A correctly exposed middle portion but your subject (the bright area) will be blown out.

antitrust · 1st January 2006

Originally Posted by ronnie_sjr

Well sometimes indeed you can just let the cam decide your exposure, but that's the case when lighting throughout the entire picture is more or less the same. ie flat lighting.

However most of the times this is not the case. Take for example you have one part of the picture very bright and one part very dark. The bright part is your main subject but it happens that it's at one corner of the picture, and the centre is mainly quite dark. If you simply meter straight with your camera your camera will try to compensate for the dark area. What do you get? A correctly exposed middle portion but your subject (the bright area) will be blown out.

ah okay. i think i'm getting what you mean.

so what i can do is that i can zoom in on the subject, meter, AE-lock, zoom out, and snap? so that my subject will be correct exposed?

its more for what they would call a tricky light situation right?

d7t3 · 1st January 2006

use AE lock when you think the lighting in the scene may fool your camera's auto exposure. after all, the camera aims to avoid extreme dark or bright results (simplistically speaking). it doesn't know what it's being pointed at. you, however, can choose a suitable spot (perhaps not even in the scene) as a reference for exposure, if the scene contains "extreme" lighting.

28th December 2005	#1
bcad84 Member Join Date: Aug 2005 Location: CCK Posts: 179	Partial Metering Hi guys, Can I check with u guys, when i use partial metering, which focusing point does it use to evaluate the surround ar? Is it the focusing point which u have set to example [ -] then the evaluation will take the right? Thanks.

28th December 2005	#2
TMC Senior Member Join Date: Sep 2004 Location: Beyond Space-Time Continuum Posts: 5,921	Re: Partial Metering depending on which focussing pt you have selected. __________________ Selling: 32GB Thumbdrive - Patriot Xporter XT 120sgd (Price reduced)

28th December 2005	#3
bcad84 Member Join Date: Aug 2005 Location: CCK Posts: 179	Re: Partial Metering Icic, Let say i have locked the exposures, then i reposition my view a bit, will it change the exposures that i have locked? I heard in some mode you can't lock the Exposures.

28th December 2005	#5
bcad84 Member Join Date: Aug 2005 Location: CCK Posts: 179	Re: Partial Metering Icic thanks... i try again...

30th December 2005	#6
roti_prata Member Join Date: Jul 2005 Location: Bt Batok Posts: 769	Re: Partial Metering use the afl/ael button instead of holding down the half-press, it only locks focus not exp

1st January 2006	#8
antitrust Member Join Date: Sep 2004 Posts: 318	Re: Partial Metering okay a newbie question here. Why use an AE-lock instead of letting the camera decide your exposure? so you'd constantly get the same amount of light for like a series of portrait? i'm very curious how to take advantage of this function cos its always found in the most convenient placements on the camera.

1st January 2006	#11
d7t3 Member Join Date: Oct 2002 Location: In the Shepherd's hands Posts: 676	Re: Partial Metering use AE lock when you think the lighting in the scene may fool your camera's auto exposure. after all, the camera aims to avoid extreme dark or bright results (simplistically speaking). it doesn't know what it's being pointed at. you, however, can choose a suitable spot (perhaps not even in the scene) as a reference for exposure, if the scene contains "extreme" lighting.