Capture One 5.1.1 overexposes.
When I open any virgin RAW file in C1 5.1.1, it is typically overexposed by 1/3 to 1/2 stop relative to the in-camera exposure. This means that if I exposed to the right at the time of capture, the histogram in C1 is pushed off the right side of the scale. Yes, I can correct this with the Exposure slider, but it seems that it should not be necessary.
I am using a Pentax K-7 and Mac OS 10.6.3.
Rob
I am using a Pentax K-7 and Mac OS 10.6.3.
Rob
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Can you perhaps publish one or a few examples? 0 -
[quote="Paul_E" wrote:
Can you perhaps publish one or a few examples?
Paul,
Do you mean a screen shot of an image with histogram? I will try to do so this evening.
Rob0 -
Rob, I meant one or a few raw files made downloadable either from a file transfer service or a server you have access to.
Of course a screen shot helps explaining how it looks at your setup.0 -
[quote="Paul_E" wrote:
Rob, I meant one or a few raw files made downloadable either from a file transfer service or a server you have access to.
Of course a screen shot helps explaining how it looks at your setup.
Paul,
I will look into the file transfer. To whom should I send the files? Do I create a Support Case with Phase One?
Rob0 -
[quote="robgo2" wrote:
[quote="Paul_E" wrote:
Rob, I meant one or a few raw files made downloadable either from a file transfer service or a server you have access to.
Of course a screen shot helps explaining how it looks at your setup.
Paul,
I will look into the file transfer. To whom should I send the files? Do I create a Support Case with Phase One?
Rob
A common technique is to use transfer services like YouSendIt (www.yousendit.com). You can sent a file to yourself. The result is a link (URL) in your mailbox. Next, you paste that URL in a posting here. Everyone you likes to help you downloads it and can respond. You can compress multiple files in one before uploading.0 -
This is the only file that I could get YouSendIt to send. It is a RAW file that is about 0.44 more brightly exposed in C1 than in the camera. Incidentally, Lightroom 3 Beta 2 gets the exposure just about right. 😕
http://download.yousendit.com/RmNEV0p5Z2dZY1JjR0E9PQ0 -
I guess I would be inclined to say that the image is in fact over exposed. The Exposure Histogram shows the data as read in the RAW format and does not reflect any adjustments to the image, and in this case that appears about 1 stop over.
http://i43.tinypic.com/15cj5p4.png
Also your metadata clearly shows an "Exposure Compensation" of +1.
http://i41.tinypic.com/2wqwqbc.png
Perhaps these other software's are applying an Auto Correct adjustment to the image as RAW data is just that, RAW and should be read consistently across the board. A simple click of the auto exposure in Capture One seems to set everything just right.
http://i43.tinypic.com/2nst4eq.png0 -
Drew,
The problem that I have with your analysis is that the histogram in the camera is shifted to the left of where it appears in C1. Is the camera giving false information?
Rob0 -
Rob,
I get more or less the same impression as Drew (although I hate to agree with him 😉) in that the image seems to be overexposed approx. 0.5 stop. A -0.5 exposure correction (approx.) in CO5 brings it into balance (this makes sense to me since such a high tone - low contrast landscape could use a +0.5 correction where it got a +1 instead).
When I open the image in PS CS4's camera raw, I get the same overexposed image without corrections. Fortunately, in this case, the overexposure is easily recoverable due to low contrast but that was not the main issue of course.
The good news is that from this example I tend to conclude that both your camera and CO5 are correct. So what's left to adjust..? 😉
Interesting landscape by the way. These two people make all the difference.0 -
[quote="robgo2" wrote:
Is the camera giving false information?
Hard to say without holding the camera in my hands but I'd be inclined to say yes. As we only read the RAW data in a manner that Pentax instructs us to, following their structure, the only other explanation is that your camera is operating with a Firmware that hasn't been reported to either Phase One or Adobe. As Paul pointed out, the overexposed results are the same in Adobe (as well as consistent in every version of Capture One) so again I would like to think the image is simply overexposed.
http://i40.tinypic.com/14jn47t.png
As a test, however, I think you should turn off any Exposure Compensation on the camera and take a look at those results. Perhaps the Camera itself disregards this exposure in the camera?
Also, if your shooting RAW+JPEG or any other variance the camera may be reading one file and not the other. That would explain the discrepancy.0 -
[quote="Drew " wrote:
[quote="robgo2" wrote:
Is the camera giving false information?
Hard to say without holding the camera in my hands but I'd be inclined to say yes. As we only read the RAW data in a manner that Pentax instructs us to, following their structure, the only other explanation is that your camera is operating with a Firmware that hasn't been reported to either Phase One or Adobe. As Paul pointed out, the overexposed results are the same in Adobe (as well as consistent in every version of Capture One) so again I would like to think the image is simply overexposed.
http://i40.tinypic.com/14jn47t.png
As a test, however, I think you should turn off any Exposure Compensation on the camera and take a look at those results. Perhaps the Camera itself disregards this exposure in the camera?
Also, if your shooting RAW+JPEG or any other variance the camera may be reading one file and not the other. That would explain the discrepancy.
On my computer, LR3 B2 exposes to the left of C1. Your point about the camera recording RAW + JPEG is a good one. I never shoot both, but I will check my cameras settings just to be sure that it is not doing that. I have the latest K-7 firmware v 1.03.
Rob0 -
Also worth mentioning that LR3 is still in Beta and there could also be an "Auto" adjustment at play. 0 -
Read this interesting article from Luminous Landscape about the so called accuracy of in camera Histograms
http://www.luminous-landscape.com/tutor ... ista.shtml0
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