DOF and Cropping take 2

Started Feb 11, 2014 | Discussions thread
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awaldram
awaldram Forum Pro • Posts: 12,513
Re: ISO, noise, exposure, and total light

bobn2 wrote:

awaldram wrote:

This gain increases the noise for any given exposure solution.

It really doesn't.

Acording to ISO 12232:2006 it does

Please explain where. So far as I know, ISO 12232:2006 says nothing about 'gain'. Nor does it say that 'gain' will increase 'noise'.

So you have a copy.?

http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=37777

ISO 12232:2006 specifies the method for assigning and reporting ISO speed ratings, ISO speed latitude ratings, standard output sensitivity values, and recommended exposure index values, for digital still cameras. ISO 12232:2006 is applicable to both monochrome and colour digital still cameras.

Though it doesn't explicitly  state gain increases the noise for any given exposure solution it does suggest methods for assigning and reporting ISO speed ratings, which implies Gain which intern implies noise.

Sorry I make assumptions base on my knowledge that causes me to jump to conclusions omitting steps along the way.

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