do ISO setting only affect the metering on a camera?

swanlake1

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• Oct 18, 2015

• #1

I just realized this...but maybe I'm wrong. ISO settings only affect the metering on the camera. So, if you use a light meter, there's no need to set ISO since the aperture and shutter speeds will remain constant regardless of the ISO settings. Is this correct? Thanks!

 

BrianShaw

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• Oct 18, 2015

• #2

Yes

 

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swanlake1

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• Oct 18, 2015

• #3

ahhh...thanks! It took me a few months to figure that one out

 

MattKing

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• Oct 18, 2015

• #4

Two cautions.

First, if you are using flash, and have a flash and camera combination that automates (fully or partially) flash exposure, then for some flash and camera combinations, setting the EI/ISO on the camera sets it on the flash as well.

Secondly, setting the EI/ISO on the camera helps you to keep track of which film you actually have in the camera/film back.

The second advantage is sometimes quite important

 

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swanlake1

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• Oct 18, 2015

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ah...this is very true! I can hardly remember what film is in what camera sometimes.

 

RobC

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• Oct 18, 2015

• #6

swanlake1 said:

I just realized this...but maybe I'm wrong. ISO settings only affect the metering on the camera. So, if you use a light meter, there's no need to set ISO since the aperture and shutter speeds will remain constant regardless of the ISO settings. Is this correct? Thanks!

Click to expand...

Providing camera is set to manual mode and not in aperture priority, shutter speed priority or some other auto mode which will all do stuff according to camera ISO speed. So remember to switch to manual.
I'm guessing your camera doesn't have 3200 ISO setting which is quite common with older cameras.

You can always set it to 400 in aperture priority mode, check the readings it gives and then switch to manual and close down 2 stops if you are using 3200 speed and don't have a setting for it.

 

Last edited by a moderator: Oct 18, 2015

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swanlake1

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• Oct 18, 2015

• #7

I think all my cameras are from a time before aperture priority was invented

 

AgX

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• Oct 18, 2015

• #8

Program auto-exposure started in 1959 (with Agfa Optima).

 

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swanlake1

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• Oct 18, 2015

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AgX said:

Program auto-exposure started in 1959 (with Agfa Optima).

Click to expand...

OK, I stand corrected!