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llareggub
llareggub  3639 forum posts United Kingdom
3 Aug 2013 - 11:43 AM


Quote: Unfortunately another (albeit well-meaning) example of the shutter speed/aperture/ISO myth.

ISO is not part of the exposure. It is what the camera does after the exposure.

Exposure relates to the amount of light reaching the sensor. Only aperture and shutter speed contribute to that.



Whilst being correct on a number of levels your insistence on this pedantry is incredibly disingenuous!

When we are discussing how to 'expose' an image, discounting the ISO settings of a camera would render such information useless, as such ISO is every bit as important an element of exposure as shutter speed or aperture.

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mikehit
mikehit e2 Member 45782 forum postsmikehit vcard United Kingdom9 Constructive Critique Points
3 Aug 2013 - 12:41 PM


Quote: Unfortunately another (albeit well-meaning) example of the shutter speed/aperture/ISO myth.

ISO is not part of the exposure. It is what the camera does after the exposure.

Exposure relates to the amount of light reaching the sensor.

You really are being unduly pedantic: when people talk about 'exposure' it is obvious that what they mean is 'correct exposure' and a 'correctly exposed' image is one that exhibits the right amount of light on a chosen medium and for the effect they want (high key/low key etc), and shutter/aperture are merely a means to an end.
With film, each ISO must be considered a 'different medium' in exactly the same way that you may expose Kodachrome slightly differently from the way you exposed Fujicolour (especially as colour shifts may occur at different ISOs) and as such the required shutter/aperture were changed according to the ISO used - nobody ever said 'ISO is what the film does after the light hits it so ignore it'. And just because a single sensor is now a dynamic part of the recording chain does not change that.

So yes, ISO is an essential part of creating a 'correctly exposed' image.

ade_mcfade
ade_mcfade  1014564 forum posts England216 Constructive Critique Points
3 Aug 2013 - 1:06 PM

why not further fog the issue and throw in Reciprocity failure

Wink

mikehit
mikehit e2 Member 45782 forum postsmikehit vcard United Kingdom9 Constructive Critique Points
3 Aug 2013 - 3:50 PM

I thought about it and decided it didn't really happen with digital.... :Wink

ade_mcfade
ade_mcfade  1014564 forum posts England216 Constructive Critique Points
4 Aug 2013 - 9:31 AM

lol - but hey, if the mission is to confuse, it's the perfect concept Wink

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