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Is the EM5’s Miss-Stated ISO concerning to you?

Started 3 months ago | Discussion thread

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mpgxsvcd

Veteran Member • Posts: 7,188

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Re: DxOmark "ISO" isn't ISO according to the International Standards Organization

In reply to MAubrey, 3 months ago

MAubrey wrote:

mpgxsvcd wrote:

That may be. However, Their method of measuring is consistent and the results are consistent across the board. Every other camera measures a higher exposure than the E-M5. In some cases that difference is a factor of two.

You may want to double check that. Phase One's IQ180's ISO100 is really ISO29--a factor of four from what I "should" be. On the other hand, The Leica M9's ISO80 is ISO144 according to DXO.

ISO is a measurement of brightness of the JPEG. DxO is measuring saturation of the sensor and pretending its ISO. Nobody is cheating or lying. Everyone is simply choosing to place a different level of priority on protecting highlights or protecting shadows by applying a different tone curve.

Is DxO's information useful? Absolutely. But its a different animal than manufacturer ISO. You're confusing two separate concepts as a result of DxO's (bad?) decision to call what they measure ISO.

--
--Mike

That is why I checked two other sources when I saw the DXO results. The two other sources indicated almost the exact same thing. DxO Mark may be testing an entirely different thing. However, all 3 tests indicate that the EM5 will give at least 2/3s of a stop less exposure than the GH2.

For my needs that is very significant.

--
GH3, Hacked GH2, and Full Spectrum GF1 Sample movies
http://www.youtube.com/user/mpgxsvcd#play/uploads
GH3 Tips and Tricks
http://www.youtube.com/watch?v=hIMdxoGbNXU
GH2 Setup Walk through
http://www.youtube.com/watch?v=uROQbbiiO2I
http://vimeo.com/user442745
GH3, GH2, GF1 Pictures
http://www.dpreview.com/galleries/4222674355/albums

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Post (hide subjects)	Posted by	When
Is the EM5’s Miss-Stated ISO concerning to you?	mpgxsvcd	3 months ago	5
Re: Is the EM5’s Miss-Stated ISO concerning to you?	mpgxsvcd	3 months ago	2
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Ron Evers	3 months ago	2
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Alumna Gorp	3 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Ron Evers	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	JayBratcher	3 months ago
Clarification required	texinwien	3 months ago
Re: Clarification required	Ron Evers	3 months ago
Thanks, another couple of questions	texinwien	3 months ago
Re: Thanks, another couple of questions	Ron Evers	3 months ago
Beautiful shot, Ron	texinwien	3 months ago
Are we really doing this AGAIN?	kenw	3 months ago	17
Re: Yes we will do this again if it really does matter.	mpgxsvcd	3 months ago	6
Re: Yes we will do this again if it really does matter.	Anders W	3 months ago	13
Re: Are we really doing this AGAIN?	mpgxsvcd	3 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Thomas Kachadurian	3 months ago	6
Re: Is the EM5’s Miss-Stated ISO concerning to you?	RicksAstro	3 months ago	8
Re: Is the EM5’s Miss-Stated ISO concerning to you?	ElginC	3 months ago	2
DxOmark "ISO" isn't ISO according to the International Standards Organization	MAubrey	3 months ago	7
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	mpgxsvcd	3 months ago	2
Not true.	texinwien	3 months ago	4
Re: Not true.	mpgxsvcd	3 months ago	1
Re: Not true.	texinwien	3 months ago	3
Re: Not true.	MAubrey	3 months ago	1
Re: Not true.	rialcnis	3 months ago
Re: Not true.	RicksAstro	3 months ago	5
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	mpgxsvcd	3 months ago	5
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	ElginC	3 months ago
Your lack of understanding is astounding.	texinwien	3 months ago	4
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	MAubrey	3 months ago	1
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	MAubrey	3 months ago	2
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	mpgxsvcd	3 months ago	1
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	MAubrey	3 months ago	3
Re: DxOmark "ISO" isn't ISO according to the International Standards Organization	MOD Aleo Veuliah	3 months ago	2
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Macx	3 months ago	4
DxO tests RAW files. ISO is for JPEGs	Just Having Fun	3 months ago
Re: DxO tests RAW files. ISO is for JPEGs	mpgxsvcd	3 months ago	2
Re: DxO tests RAW files. ISO is for JPEGs	MAubrey	3 months ago
Here is your problem	Just Having Fun	3 months ago	5
Re: Here is your problem	mpgxsvcd	3 months ago	3
Re: Here is your problem	jim stirling	3 months ago	4
It was a ridiculous post with another motive	Just Having Fun	3 months ago	2
I think the reaction here	Art_P	3 months ago	1
Re: I think the reaction here	mpgxsvcd	3 months ago	1
Re: I think the reaction here	MAubrey	3 months ago	3
Re: Look at the DxOMark SNR (18%) Data	Detail Man	3 months ago	6
Thank you	Just Having Fun	3 months ago
Re: I think the reaction here	MAubrey	3 months ago
Re: Here is your problem	MAubrey	3 months ago
Re: Here is your problem	Anders W	3 months ago	3
You keep changing your story!	Just Having Fun	3 months ago
As long as	Art_P	3 months ago	3
No	Russ Houston	3 months ago
Read and Learn	texinwien	3 months ago	4
Not at all - it takes photo and met my expectations :)	reygon	3 months ago
Re: Not at all - it takes photo and met my expectations :) Indeed.	SeeRoy	3 months ago
What matters is exposure, not the ISO setting	noirdesir	3 months ago	5
Re: What matters is exposure, not the ISO setting	jim stirling	3 months ago	4
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	Detail Man	3 months ago	4
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	Pete Berry	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	Detail Man	3 months ago
Is it true that Subway foot long subs are actually 11.5"!?	SirSeth	3 months ago	3
But if you compare the girth.....	Wallybipster	3 months ago	3
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Henry Richardson	3 months ago	2
Excellent! Should be required reading	texinwien	3 months ago	1
Re: Excellent! Should be required reading	Anders W	3 months ago
Re: Excellent! Should be required reading	Detail Man	3 months ago
Hmmm	texinwien	3 months ago	1
Perhaps	Art_P	3 months ago	2
Re: Hmmm	Anders W	3 months ago
Re: Hmmm	texinwien	3 months ago
Re: Hmmm	Anders W	3 months ago
Re: Hmmm	texinwien	3 months ago
Re: Hmmm	Anders W	3 months ago
Re: Hmmm	noirdesir	3 months ago
Re: Hmmm	Anders W	3 months ago
Re: Hmmm	noirdesir	3 months ago
Re: Hmmm	Anders W	3 months ago
Re: Hmmm	noirdesir	3 months ago
Re: Hmmm	Anders W	3 months ago	1
Re: Hmmm	noirdesir	3 months ago
Re: Hmmm	Anders W	3 months ago
ACR EV post-scaling	Pete Berry	2 months ago
Re: Hmmm	Detail Man	3 months ago
Re: Hmmm	texinwien	3 months ago
Re: Hmmm ...	Detail Man	3 months ago
Re: Hmmm ...	texinwien	3 months ago
Re: Hmmmmmm ...	Detail Man	2 months ago
Re: Excellent! Should be required reading	exdeejjjaaaa	3 months ago
I imagine a scenario like the following	texinwien	3 months ago	2
Re: I imagine a scenario like the following	richarddd	3 months ago
Re: I imagine a scenario like the following	texinwien	3 months ago
Correction	texinwien	3 months ago
Re: I imagine a scenario like the following	richarddd	3 months ago
Misunderstanding	texinwien	3 months ago
Re: Misunderstanding	richarddd	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	RichRMA	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	LTZ470	3 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you - Nope	Brian Wadie	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Detail Man	3 months ago	4
Re: Is the EM5’s Miss-Stated ISO concerning to you?	DonSantos	3 months ago	3
Re: Is the EM5’s Miss-Stated ISO concerning to you?	secretworld	3 months ago	4
Re: I agree, no arguments with this.	MOD Aleo Veuliah	3 months ago	3
Re: I agree, no arguments with this.	bluelemmy	3 months ago	1
That is the question	Art_P	3 months ago	1
Re: That is the question	MOD Aleo Veuliah	3 months ago
Re: I agree, no arguments with this.	MOD Aleo Veuliah	3 months ago	1
If the GH3 meters like the GH2	texinwien	3 months ago
Re: If the GH3 meters like the GH2	MOD Aleo Veuliah	3 months ago	1
Re: I agree, no arguments with this.	RicksAstro	3 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you?	RicksAstro	3 months ago	2
Re: Is the EM5’s Miss-Stated ISO concerning to you?	mpgxsvcd	3 months ago	2
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Anders W	2 months ago	3
Re: Is the EM5’s Miss-Stated ISO concerning to you?	texinwien	2 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you?	secretworld	2 months ago
For the record, you're wrong	texinwien	2 months ago
Re: For the record, you're wrong	secretworld	2 months ago
Re: For the record, you're wrong	texinwien	2 months ago
Re: For the record, you're wrong	secretworld	2 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Anders W	3 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you?	DonSantos	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Anders W	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	DonSantos	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Macx	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	Anders W	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	Detail Man	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	DonSantos	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	Anders W	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you ?	Detail Man	3 months ago
Re: Is the EM5’s Miss-Stated ISO concerning to you?	cptobvious	3 months ago
Complain to DxO then	Just Having Fun	3 months ago	2
Re: Complain to DxO then	cptobvious	3 months ago
Re: Complain to DxO then	RicksAstro	3 months ago	1
Re: Complain to DxO then	MOD Aleo Veuliah	3 months ago	1
Re: Complain to DxO then	Anders W	3 months ago
Re: Complain to DxO then	DonSantos	3 months ago	3
Re: Complain to DxO then	Anders W	3 months ago
Re: Complain to DxO then	DonSantos	2 months ago
Re: Complain to DxO then	Anders W	2 months ago
Lighting may be different though.	Just Having Fun	2 months ago
Re: Lighting may be different though.	DonSantos	2 months ago	1
Re: Lighting may be different though.	MAubrey	2 months ago
Re: Lighting may be different though.	DonSantos	2 months ago
Re: Simple minded but simplified...	LTZ470	2 months ago
Re: Simple minded but simplified ...	Detail Man	2 months ago
Re: Simple minded but simplified...	Anders W	2 months ago
Re: Lighting may be different though.	zxaar	2 months ago
Re: Lighting may be different though.	Anders W	2 months ago
That's what exposure comp is for...	BJN	2 months ago	1
Re: Is the EM5’s Miss-Stated ISO concerning to you?	cptobvious	2 months ago

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