5d 3 underexposure

[crustyraven]

I am having a major problem with my 5d3 in that it is underexposing in Photoshop and Lightroom.  In the Photoshop Raw Filter, shooting raw pics exposure registers at -2.02 underexposed.  The pics are very dark even in a well lit day scene.  I sent the camera to a Canon service center expecting the problem to be corrected.  No change in the pics when it was returned to me.  Using my Canon 30D and my 3Ti, I have no problem in exposure, the pics look perfect straight out of the camera into Photoshop and Lightroom.  A Canon Rep suggested their software so I tried it and the exposure looked perfect.  I am completely befuzzled!  I don't use their free software since I have the best software available.  I have looked into my software for a setting that might fix the problem but have found nothing.  I reset the camera to default after the Rep made the suggestion.  No help there.  If you have a solution, I hope you will post it here.

[RobertTheFat]

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@ebiggs1 wrote:

Bob from Boston,

"Never heard of that. Ever!  PS or LR is not causing the problem."

This is my educated, opinion, form several decades of using PS and/or LR.

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Ah, OK; that explains it. I had thought, from the wording, that you were presenting it as fact.

BTW, how many decades is "several"? I see that Wikipedia thinks that Photoshop came out in 1988 and Lightroom in 2007.

[RobertTheFat]

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@kvbarkley wrote:

It could be that LR and PS understand the setting, but Aperture (i.e., the Apple RAW Processor) certainly does not and causes just this kind of behaviour. While the RAW data is readily accesible, the camera settings included have to be reverse engineered, and sometimes they get it wrong. 

It is certainly worth a try.

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So you're saying that on an Apple computer PS and LR use a 3rd-party (i.e., neither Canon nor Adobe) RAW codec that DPP doesn't need because it understands the Canon RAW format natively? I guess that would let Adobe off the hook, sort of.

[kvbarkley]

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@RobertTheFat wrote:

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@kvbarkley wrote:

It could be that LR and PS understand the setting, but Aperture (i.e., the Apple RAW Processor) certainly does not and causes just this kind of behaviour. While the RAW data is readily accesible, the camera settings included have to be reverse engineered, and sometimes they get it wrong. 

It is certainly worth a try.

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So you're saying that on an Apple computer PS and LR use a 3rd-party (i.e., neither Canon nor Adobe) RAW codec that DPP doesn't need because it understands the Canon RAW format natively? I guess that would let Adobe off the hook, sort of.

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No, Apple uses its own RAW codec, so it affects Apple Apps like Aperture. Adobe uses Camera Raw on the Mac, too, which I assume is the same as the Windows version. I use the Apple apps, and rarely use Camera Raw. 

[ebiggs1]

"BTW, how many decades is "several"? I see that Wikipedia thinks that Photoshop came out in 1988 and Lightroom in 2007."

When you are as old as I am, the stone tablets are more difficult to read.  Could be one or could be 10 who knows?

We had PS before it was called Photoshop.  It was only B&W at that time.  It was only Mac.  As I recall about all you could do was change the brightness and contrast.  Some other little things.  I beta tested for Adobe for a couple years.

I don't recall the original name but it was created by two brothers.  Adobe later bought it and changed the name to Photoshop 1.

Since then, in 2005 or so, Adobe changed the name again to Creative Suite 6, or whatever number they are up to now.  I have stopped with CS6.  I don't like the rental software model and I don't see myself needing anything CS6 can not do at this point in my life.

I would be stuck if/when I get a 1Dx since CS6 won't read its files. LR is still being updated but CS6 is not.  LR can still open them and let you edit in PS, however.

[ebiggs1]

""Never heard of that. Ever!  PS or LR is not causing the problem.""

 This is my educated, opinion, form several decades of using PS and/or LR.

I will still strongly repeat, IMHO, it is not PS or LR causing the OP's issue.  If it happens to be, I will be super surprised and I will say 'Holy DSLR, Batman!'.