Roland Allemand
New member
Does anyone know if the 30D supports linear output like the 1D bodies? I'm trying to use Fred's Highlight Recovery Photoshop action and not having any success. Thanks
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Linear Output
- Thread starter Roland Allemand
- Start date
Ferenc Harmat
New member
Linear? Can we have access to your RAW file, so we can take a look at it out?
BTW: I own a 30D and 1D MarkII-N, just in case...
Asher Kelman
OPF Owner/Editor-in-Chief
Hi Roland,
Welcome to OPF and congrats on your first post!
Do you happen to have a 30D RAW file? If so open it in photoshop and then Adobe RAW will open it for you and you will see a dialog box for a Linear output.
Adjust Details Lens Curve Calibrate tabs are found below the histogram on the right of the image.
Click on the Curve tab and select the top option, Linear.
Does that help?
Asher
Welcome to OPF and congrats on your first post!
Do you happen to have a 30D RAW file? If so open it in photoshop and then Adobe RAW will open it for you and you will see a dialog box for a Linear output.
Adjust Details Lens Curve Calibrate tabs are found below the histogram on the right of the image.
Click on the Curve tab and select the top option, Linear.
Does that help?
Asher
John Sheehy
New member
That means that ACR uses what it considers a standard tone curve; it isn't linear in the sense that it has a gamma of 1.0.
Asher Kelman
OPF Owner/Editor-in-Chief
Well, John, that's not at all proper! They should not be using a technical term and confusing people!
Asher
Asher
Roland Allemand
New member
Asher, First of all let me say, I'm primarily a sports shooter at heart and am trying to improve my craft. Your site is loaded with such great minds with a wealth of infomation. Nill turned me on to your site last year and he was right, this is the best. Thanks for letting me participate. And yes, your answer worked on the RAW file. Thanks again, Roland Allemand
Asher Kelman
OPF Owner/Editor-in-Chief
Glad it helped.
Nill did a great thing by sending you here. He has helped so much with our forum in so many ways.
Now re "linear output" itself, John Sheehy has pointed out that the linear curve of ACR, may not in fact be true gamma = 1.0 linear output. Of that, I'd love more documentation!
Asher
Nill did a great thing by sending you here. He has helped so much with our forum in so many ways.
Now re "linear output" itself, John Sheehy has pointed out that the linear curve of ACR, may not in fact be true gamma = 1.0 linear output. Of that, I'd love more documentation!
Asher
John_Schwaller
New member
From this article: http://www.adobe.com/digitalimag/pdfs/phscs2ip_camraw3.pdf
page 10 It states that Adobe ACR (and probably Lightroom) converts and works with the raw data in "linear" mode. The 'Curves' command works with this linear data "...but present a gamma 2.2-corrected user interface.
Looking at linear data vs. corrected is "interesting. I have not done this for some time, but did play with it "way back" with Breezebrowser....which I assume can still do it.
The "linear" curve....vs. medium or strong contrast curves....are based on the gamma corrected representations.
John
page 10 It states that Adobe ACR (and probably Lightroom) converts and works with the raw data in "linear" mode. The 'Curves' command works with this linear data "...but present a gamma 2.2-corrected user interface.
Looking at linear data vs. corrected is "interesting. I have not done this for some time, but did play with it "way back" with Breezebrowser....which I assume can still do it.
The "linear" curve....vs. medium or strong contrast curves....are based on the gamma corrected representations.
John