Is the canon's marketed iso value really fake??? - General Chat - CHDK Forum
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Is the canon's marketed iso value really fake???

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Offline dzsemx

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Is the canon's marketed iso value really fake???
« on: 30 / March / 2008, 10:53:36 »
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I wonder if it's really just marketing or these "marketed" values are really based on some scientific measurements...
Can anybody verify it using a non digital SLR for example?
« Last Edit: 30 / March / 2008, 11:01:47 by dzsemx »
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Offline Barney Fife

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Re: Is the canon's marketed iso value really fake???
« Reply #1 on: 30 / March / 2008, 22:26:51 »
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« Last Edit: 22 / April / 2008, 15:18:54 by Barney Fife »
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Offline Racenviper

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Re: Is the canon's marketed iso value really fake???
« Reply #2 on: 31 / March / 2008, 01:14:52 »
Thats not right, if it is 1/500 it should be 1/500 not 1/512. We should sue the industry for mis-imforming us all these years. Someone sued the monitor industry over the viewable area of a monitor. We should sue the camera industry for the faking of the shutter and ISO speeds.

 :lol
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Offline Barney Fife

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Re: Is the canon's marketed iso value really fake???
« Reply #3 on: 31 / March / 2008, 07:04:14 »
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« Last Edit: 22 / April / 2008, 15:19:13 by Barney Fife »
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Offline jerjoz

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Re: Is the canon's marketed iso value really fake???
« Reply #4 on: 06 / April / 2008, 11:43:22 »
and photoshop :)
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Offline Barney Fife

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Re: Is the canon's marketed iso value really fake???
« Reply #5 on: 06 / April / 2008, 12:22:45 »
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« Last Edit: 22 / April / 2008, 15:19:32 by Barney Fife »
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dew

Re: Is the canon's marketed iso value really fake???
« Reply #6 on: 06 / April / 2008, 13:06:10 »
Quote from: Barney Fife on 06 / April / 2008, 12:22:45
better software than Photoshop.
Please share with us - - and please let it not be (shudder) the gimp.  :o
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Offline Barney Fife

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Re: Is the canon's marketed iso value really fake???
« Reply #7 on: 07 / April / 2008, 01:08:13 »
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« Last Edit: 22 / April / 2008, 15:19:50 by Barney Fife »
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Offline hiker_jon

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Re: Is the canon's marketed iso value really fake???
« Reply #8 on: 11 / April / 2008, 00:59:09 »
Quote from: Barney Fife on 30 / March / 2008, 22:26:51
The 'Market', or marketed, value is the rounded value that Canon would like you to see for simplicity sake. This is a bit like "the number on the box" vs. what is actually inside the box. AllBest chose this description of 'Market Value' because there is no clear adjective to describe the two different kinds of numerical values in English. Just remember that 'Market' = Canon's dumbed-down user-friendly rounded value. And 'Real' refers to the actual number being used or selected at the time.[/i]

DPReview uses the terms "indicated" iso and "actual" iso.  These are much more descriptive terms and are clearer English.  For the Canon 30D DPReview found that the actual ISO was higher (example 100 indicated, 125 actual), but for the recent Canon cameras that they have tested (DSLR's) the indicated and actual ISO are the same.  As far as I can tell DPReview has not tested the Canons that CHDK runs on.

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Offline Barney Fife

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Re: Is the canon's marketed iso value really fake???
« Reply #9 on: 11 / April / 2008, 05:51:57 »
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« Last Edit: 22 / April / 2008, 15:20:09 by Barney Fife »
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