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Archive 2010 · 1D Mark IV and ACR/LR

72chevelle454
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p.1 #1 · p.1 #1 · 1D Mark IV and ACR/LR

Just an FYI if your using the New ACR or Lightroom.. it seems to color shift cyan and magenta channels. I didn't look on adobes site yet to see if this problem was logged.

Chad

DPP
http://caswell.zenfolio.com/img/v4/p566285293.jpg
ACR/LR
http://caswell.zenfolio.com/img/v8/p849387146.jpg

Jan 04, 2010 at 02:53 PM

Specularist
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p.1 #2 · p.1 #2 · 1D Mark IV and ACR/LR

The lens is creating the colour, the sensor is capturing it, and ACR is respecting that. It's DPP that's mangling the file to eliminate it. Who knows what else DPP does to colour—particularly fine colour details—in the process...

Jan 04, 2010 at 03:06 PM

72chevelle454
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p.1 #3 · p.1 #3 · 1D Mark IV and ACR/LR

Im not so sure I agree with that, I took a Jpeg straight out of camera and it looked just like DPP example.. So I'm guessing its the Raw conversion. I could be wrong but shooting Jpeg straight of of camera should show any lens color shifts and it looked fine.

Chad

Jan 04, 2010 at 03:10 PM

alanwarp
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p.1 #4 · p.1 #4 · 1D Mark IV and ACR/LR

The JPEG and DPP conversion should look the same, they use the same algorithms. It appears that the camera (JPEG) and DPP have built in chromatic abberation reduction and ACR/LR does not.

There may even be an option in DPP to turn the CA correction off, I'm not sure.

In other words, there's nothing wrong with ACR/LR, Canon's just trying to fix-up the CA for you.

Jan 04, 2010 at 04:39 PM

Mirek Elsner
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p.1 #5 · p.1 #5 · 1D Mark IV and ACR/LR

Looks like CA, but it seems pretty strong for 50/1.4 lens...

Jan 04, 2010 at 04:47 PM

M Vers
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p.1 #6 · p.1 #6 · 1D Mark IV and ACR/LR

Mirek Elsner wrote:
Looks like CA, but it seems pretty strong for 50/1.4 lens...

Especially when stopped down to f/3.2.

Jan 04, 2010 at 04:49 PM

thedigitalbean
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p.1 #7 · p.1 #7 · 1D Mark IV and ACR/LR

Yea that's CA caused by the lens. DPP and the in camera JPEG engine have done some post processing to remove it.

Jan 04, 2010 at 04:50 PM

72chevelle454
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p.1 #8 · p.1 #8 · 1D Mark IV and ACR/LR

I hear what you guys are saying, really I do, I shot with my Mark III since they came out and never noticed this with the Raw files from the Mark III using ACR/LR. I agree with Mirek, it does seem very strong with the 50/1/4 and is shows the same with my 500mm shots as well.

Chad

Jan 04, 2010 at 04:51 PM

kazman442
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p.1 #9 · p.1 #9 · 1D Mark IV and ACR/LR

From what I have seen in DPP there is a CA area but it is not ON by default and needs to be adjusted to work also.

Jan 04, 2010 at 05:17 PM

FretNoMore
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p.1 #10 · p.1 #10 · 1D Mark IV and ACR/LR

Isn't there CA removal you can try in Lightroom too?
I think it's called Lens Correction, in the Develop mode.

Jan 04, 2010 at 05:46 PM

Tom_W
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p.1 #11 · p.1 #11 · 1D Mark IV and ACR/LR

Specularist wrote:
The lens is creating the colour, the sensor is capturing it, and ACR is respecting that. It's DPP that's mangling the file to eliminate it. Who knows what else DPP does to colour—particularly fine colour details—in the process...

"Mangling" might be a bit harsh. DPP is correcting the color shift, though there's no telling if it's done so due to a database of lens characteristics or if it is some kind of "blanket" change that affects all images.

Jan 04, 2010 at 06:15 PM

Tom_W
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p.1 #12 · p.1 #12 · 1D Mark IV and ACR/LR

Perhaps the latest version of ACR hasn't been fully tweaked for the 1DIV yet.

Jan 04, 2010 at 06:17 PM

72chevelle454
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p.1 #13 · p.1 #13 · 1D Mark IV and ACR/LR

Tom_W wrote:
Perhaps the latest version of ACR hasn't been fully tweaked for the 1DIV yet.

Thanks Tom, I agree.

Jan 04, 2010 at 06:33 PM

davenfl
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p.1 #14 · p.1 #14 · 1D Mark IV and ACR/LR

Specularist wrote:
The lens is creating the colour, the sensor is capturing it, and ACR is respecting that. It's DPP that's mangling the file to eliminate it. Who knows what else DPP does to colourï¿½particularly fine colour detailsï¿½in the process...

Sorry but I think that is utter non-sense. It looks like an Adobe issue which is pretty typical for newly released bodies.

Dave

Jan 04, 2010 at 06:55 PM

skibum5
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p.1 #15 · p.1 #15 · 1D Mark IV and ACR/LR

72chevelle454 wrote:
Just an FYI if your using the New ACR or Lightroom.. it seems to color shift cyan and magenta channels. I didn't look on adobes site yet to see if this problem was logged.

Chad

DPP
http://caswell.zenfolio.com/img/v4/p566285293.jpg
ACR/LR
http://caswell.zenfolio.com/img/v8/p849387146.jpg

it sounds like you used all the DPP lens correction tools, i have noticed that DPP can impressively remove longitudinal CA (which that is) at times

it's not an ACR bug at all
it's a lens design compromise
which DPP recetnly seems to be able to tackle better than you'd expect, at times

Jan 04, 2010 at 07:29 PM

skibum5
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p.1 #16 · p.1 #16 · 1D Mark IV and ACR/LR

davenfl wrote:
Sorry but I think that is utter non-sense. It looks like an Adobe issue which is pretty typical for newly released bodies.

Dave

it's not nonsense at all
notice how it shifts magenta on one side of the focal plane and green on the other and yes the 50mm is quite prone to longitudinal CA

Jan 04, 2010 at 07:30 PM

davenfl
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p.1 #17 · p.1 #17 · 1D Mark IV and ACR/LR

skibum5 wrote:
it's not nonsense at all
notice how it shifts magenta on one side of the focal plane and green on the other and yes the 50mm is quite prone to longitudinal CA

Not at those f stops to that extent and he did not use any correction in DPP. I think it is a early release software issue.

Dave

Jan 04, 2010 at 07:44 PM

72chevelle454
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p.1 #18 · p.1 #18 · 1D Mark IV and ACR/LR

OK people here's a screen grab showing NO DPP settings were applied to correct the image.

http://caswell.zenfolio.com/img/v6/p746761249.jpg

Jan 04, 2010 at 07:55 PM

thedigitalbean
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p.1 #19 · p.1 #19 · 1D Mark IV and ACR/LR

72chevelle454 wrote:
OK people here's a screen grab showing NO DPP settings were applied to correct the image.

You are indeed correct, it appears the 1D4 support in ACR 2.6 is preliminary. Would be curious to see what other 3rd party RAW converters are doing.

Jan 04, 2010 at 08:19 PM

rd4tile
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p.1 #20 · p.1 #20 · 1D Mark IV and ACR/LR

Chad, if you send me the RAW I'll run it through Aperture.

Jan 04, 2010 at 10:03 PM

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