Lens correction for the Canon Powershot G1x

When will Adobe offer lens correction for the Canon Powershot G1x in Lightroom?

It's now in the LR 4.3 release candidate
I installed the release candidate on a separate PC, found the lens profile file in the install folder and copied tge file to the appropriate folder in my 4.2 install.

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  • Now Here! Support for the Canon PowerShot G1

    After much trial and error, I have figured out how to support the Canon PowerShot G1.
    I started with the settings for the hacked un-supported G2 (thanks to user jpugsley for this message: http://discussions.apple.com/thread.jspa?threadID=262930). Then I read the source code to the open source dcraw.c command line raw convertor. There I found Adobe's translation values for the G1 which has a CYGM filter array. I'd say this opens up opportunities for many other CYGM cameras to be supported.
    The premul values seem to affect the color balance of the images. Adjusting the values very slightly may be helpful. I don't know what most of the other values are. The m2 array values came from dcraw.c You probably shouldn't touch those.
    The images seem to open fine in Preview and Aperture. I hope Apple officially supports this camera soon (Aperture 1.1?).
    How To:
    All you have to do is paste the following XML into this file (make sure you save a backup of the file first). Rebooting is NOT needed:
    /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ImageIO.fram ework/Versions/Current/Resources/Raw.plist
    <key>Canon-PowerShot G1</key>
    <dict>
    <key>blackReplace</key> <true/>
    <key>black</key> <integer>32</integer>
    <key>max</key> <integer>1023</integer>
    <key>white</key> <integer>1023</integer>
    <key>premul0</key> <real>1.00</real> <key>premul1</key> <real>1.2</real> <key>premul2</key> <real>1.1</real> <key>premul3</key> <real>1.11</real>
    <key>m1</key>
    <array>
    <real>1.0507</real> <real>-0.4281</real> <real>-0.0161</real>
    <real>-0.5540</real> <real>1.2938</real> <real>0.2909</real>
    <real>-0.1205</real> <real>0.1844</real> <real>0.8335</real>
    <real>-0.1566</real> <real>1.1051</real> <real>0.0577</real>
    </array>
    <key>m2</key>
    <array>
    <real>-0.4778</real> <real>0.9467</real> <real>0.2172</real>
    <real>0.4743</real> <real>-0.1141</real> <real>0.4344</real>
    <real>-0.5146</real> <real>0.9908</real> <real>0.6077</real>
    <real>-0.1566</real> <real>1.1051</real> <real>0.0577</real>
    </array>
    <key>mc</key> <real>0.83355</real>
    <key>otrc</key>
    <array>
    <real>0.00</real> <real>0.090</real> <real>1.467</real> <real>0.260</real> <real>1.842</real> <real>0.652</real> <real>1.040</real> <real>0.538</real>
    </array>
    </dict>

    This is stellar.
    Thanks. It wasn't as hard as I thought it would be... I didn't think it was possible at first.
    is this in fact all
    there is to supporting a new camera RAW format --
    providing a translation array in a plist file?
    What follows is pure speculation... I really don't have a solid understanding of this at all.
    Seems like all you have to do is get these Camera->XYZ trans values (trans may stand for transform or translate). The image is essentially monochrome with color filters over it. Some cameras use RGB filters, looks like Apple has supported a lot of those. Some are CYGM, so far Apple hasn't supported any of those. Apple has supported the Sony DSC F828 which is RGBE where E stands for Emerald. Total guess, but each set of three values in the m2 array is associated with a color. (9 total for RGB and 12 for CYGM and RGBE). Guessing, each of these sets of three values probably is used to calculate a response curve for each color.
    Basically, when dcraw.c provided twelve values, I began to poke around Raw.plist and discovered the Sony F828 camera also had 12 values in its m2 array. It also had 4 premul (pre-multiplier) values, one for each set of 3 m2 values. So I took a leap of faith that CYGM could be supported because after all, a color is just a color. Does the computer really care if the value represents emerald or magenta? This produced a promising image but color was way off. I had to then tweak each premul value to bring the color in. Those values don't seem to be linear. A minor adjustment can either dramatically change everything or have no noticeable effect.
    Are all RAW formats essentially supported via simply a
    declarative filter array, or did it just happen to
    work for G1 RAW, and other formats are different?
    My amateur guess is many cameras are similar and a few stand out as different. For example, I'm guessing the Foveon cameras are an example of a different sort of RAW file. Thats just a guess based on looking at dcraw.c.
    if this is all there is to
    supporting a new RAW format, I wonder
    - why more of the RAW formats weren't supported in the first place.
    To get you to buy a fancy new camera on the Apple Store? Lazyness? Not enough time? Lack of cooperation from the manufacturer? All of the above?
    - why RAW formats haven't been progressively added
    since the Aperture release.
    Seems like they could have had support for dozens of additional cameras. This took me only a matter of hours to figure out. Someone with a deep understanding could have done this in minutes.
    The real time sink is when you almost have the colors correct and you are endlessly tweaking trying to get them perfect... as you will see, the colors will be fine in certain exposures and way off in others. Look at daylight vs. tungsten photos. It may take many hours to get the values of the camera correct to customers exacting standards. We, the photographers, are very picky.
    Why don't we just contact Canon, Nikon, etc. and get
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    There are values for 83 additional cameras that aren't supported by Apple in the dcraw.c file. That's a place to start.

  • Hello, Can you tell me where I can found the lens profil for the Canon 500MM F4 Mark II

    Can some one tell me where I could find this lens profile for Lightroom 5.4.
    thanks

    Given the 600mm F4 IS II (February 2011) lens profile hasn't been created yet it may be a while (if ever). I wouldn't worry about it since the lens profile only corrects distortion and vignetting. There is virtually no distortion with either of these lenses and vignetting is within 0.2EV using the 600mm profile, which you can set as the "default" profile. Personally I think people put too much emphasis on the need for "automatic" lens profile correction. All my lens profile defaults are set to Distortion = 0 and Vignetting = 50. I change the setting only when an image appears to need more correction. WHY?
    REASON
    Distortion correction crops part of the image and increases "edge" stretching with wide angle lenses–It's a trade-off for straight lines in the image. IMHO-If it's not visible in the image you don't need it. 100% Vignetting correction setting can look un-natural and amplifies lens aberrations and softness in the corners, which is where vignetting correction is applied the most.
    My 2 cents worth.

  • Anybody use a camera harness for the Canon PowerShot S X 40?

    Love the camera. I need a harness to keep it handy on hikes & when cross country skiing.

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  • Lens profile for the Canon 24-70 II?

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    Thanks
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    It's now in the LR 4.3 release candidate
    I installed the release candidate on a separate PC, found the lens profile file in the install folder and copied tge file to the appropriate folder in my 4.2 install.

  • Lens correction for Canon Powershot G1x

    Please add Lens correction for the Canon Powershot G1 X into the LR 4.4 Update.
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    I cant't understand it!!

    This is a User to User forum. Official requests to Adobe go here: http://feedback.photoshop.com/photoshop_family/products/photoshop_family_photoshop_lightro om
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  • Lens Corrections for Canon SX50 camera

    Can Photoshop CS6 (Windows 8) make lens corrections for the Canon PowerShot SX50 HS camera?
    My version of CS6 (64bit) is Photoshop: 13.0.1 x64 and CameraRaw plug-in is 7.3.0.71. There is a file
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    Pip Hamilton

    The camera has built-in lens corrections, and Adobe already replicates these.  You cannot turn them off, so there is no selection to be made.
    Here is what an SX50 HS raw pixel data really looks like using a raw converter that doesn't do lens corrections.  Notice the significant barrel distortion and the lens tube clearly visible in the corners:
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  • Lens correction profile for the Canon 18-135 STM lens in Lightroom 5 ?

    How or where can I get the lens correction profile for the Canon 18-135 STM lens in Lightroom 5 ? In effect he is not available in my list of correction lens so my lightroom is up to date apparently :/
    Thanks in advance for answer.

    There are two types of Lens profiles - raw and JPEG. It looks like you are trying to process a JPEG image and Adobe has only provided a raw lens profile for the 18-135mm IS STM lens.
    You have four options:
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    2) Follow the procedure outlined by Steve Sprengel in this post:
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    More detailed instructions here for a Pentax lens example:
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  • Need a lens correction for Canon zoom 8mm-15mm f4/L, it's not in the list of lens in LR

    Need a lens correction for Canon zoom 8mm-15mm f4/L, it is not in the list of lens in Ligthroom
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    It's available with ACR 8.4RC, so I would imagine that it will be available with LR 5.4RC/5.4. Just when that will be, is not known by anybody outside of Adobe. Hopefully soon.

  • Does the lens correction profile for the Canon 24-70 eliminate all distortion?

    The new Camera Raw seems excellent in the Lens Correction...I will be photographing dancers and will have only 9 feet to work with. I would like to use the widest lens I can with lens correction. The question is whether this new program will flatten out the 24mm lens or if I should use the 35.
    Roger Minkow

    To add to Eric's great explanation, the corrections here are for barrel and pincushion distortion. That can be present in a lens of any focal length.
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    There is also distortion from being too close to the subject. Focal length doesn't really matter in that, except that longer lenses don't have the field of view to take in the close subject and can't usually focus that close. So we associate this distortion with wide angle lenses. This sort of distortion would be that where a person's nose in the middle of the frame looks very large and there is quick falloff in size to the eyes, ears, background. I think of this as more an issue of perspective, and this is controlled by camera placement, not by focal length or lens design.
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  • Camera Raw RC 8.6 does not automatically locate the lens profile for the new Canon 16-35mm f4 lens.  The profile is in RC 8.6

    I have loaded Camera Raw RC 8.6.  It can not automatically locate the new Canon 16-35mm f4 lens, although the lens profile can be manually found.

    Hi
    I forgot to answer one question.
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    a major headache for the user of this new lens.
    In a message dated 7/28/2014 3:10:44 P.M. Central Daylight Time, 
    [email protected] writes:
    Camera  Raw RC 8.6 does not automatically locate the lens profile for the
    new  Canon 16-35mm f4 lens.  The profile is in RC 8.6
    created by ccastleb (https://forums.adobe.com/people/ccastleb)  in Adobe 
    Camera Raw - View the full  discussion
    (https://forums.adobe.com/message/6591754#6591754)

  • I just bought the new PowerShot G1X. Aperture cannot read the raw files. Is there a fix for this?

    I just bought the new PowerShot G1X. Aperture cannot read the raw files. Is there a fix for this? I am using Aperture 3.2.2 with a MacBook Pro.

    I don't know -- sorry.  I don't think it matters -- once your camera is supported, you can easily force a re-processing of the Masters.  If you can import them as RAW+JPEG pairs, I would.  Set the JPG as Master until Aperture can convert the RAWs.
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    (Added:)
    And _always_ back up your files.  In this case, if you have to, you'll be able to re-import them.
    Message was edited by: Kirby Krieger

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