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Thread: Phase One Trichromatic In Depth Article with Raw Files

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    Phase One Trichromatic In Depth Article with Raw Files

    I've just completed a 7000-word two-part technical article on the new Phase One IQ3 100mp Trichromatic covering the following topics:
    - Why the launch marketing materials could easily confuse reader about what improvements were made
    - An intro to color science for those that might need a refresher
    - Behind-the-scenes information on the relationship between Phase One and Sony
    - WHAT specific improvements were made
    - HOW those specific improvements manifest in real world images
    - DOWNLOADABLE raw file comparisons of the IQ3 100mp and IQ3 100mp Trichromatic

    You can read that two-part article here:
    - Phase One Trichromatic: Part 1, The Science - How color works, more or less
    - Phase One Trichromatic: Part 2, The Results - What was improved, and how.

    Want to play with a Trichromatic yourself?
    - In the last two weeks we had Trichromatic Open Houses in New York and LA with the head of Phase One R+D and the head of its Color Science team.
    - Next week we host the official Phase One booth at Photo Plus Expo in NYC.
    - The week after we come to Austin and Houston for open houses and to teach Capture One Masters Program.
    - We are always glad to arrange for you to test the back at your own studio or home. Just contact us.
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183
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    Re: Phase One Trichromatic In Depth Article with Raw Files

    The article is password protected...
    Arca Swiss Rm3di | XF | P1 IQ180 IQ3100 Trichromatic |

    http://www.awolfphotography.com/

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by awolf View Post
    The article is password protected...
    Thanks! Should be fixed.
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    thanks. I enjoyed both articles and believe they were very helpful in understanding what goals Phase had in mind, and how they feel they succeeded. The comparisons were very useful.

    The updated comparison using the curves instead of the triangles went a long way in clearing up some major misconceptions I had about the back.
    wayne
    My gallery
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    Re: Phase One Trichromatic In Depth Article with Raw Files

    As I mentioned on the other site that you posted this to, thanks much for writing this up. The new back makes total sense now, something Phase One's initial marketing efforts failed at.
    E.J. Peiker
    www.EJPhoto.com

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Great articles, Doug - thank you!

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Not only great but entertaining too:

    ”cutting these tails turns out to significantly improve the rendering of problematic subject matter, turning dark leather red, skies purple, and dark skin tones slightly Oompa-Loompa”
    Remember: adventure before dementia!

    The World is a book, and those that do not travel read only one page ...

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Doug, you may want to run a spell checker through your text. I found one obvious typo, I am sure there are others:

    New Color Response: This means taht, among other things...

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by Wayne Fox View Post
    thanks. I enjoyed both articles and believe they were very helpful in understanding what goals Phase had in mind, and how they feel they succeeded. The comparisons were very useful.

    The updated comparison using the curves instead of the triangles went a long way in clearing up some major misconceptions I had about the back.
    Quote Originally Posted by ejpeiker View Post
    As I mentioned on the other site that you posted this to, thanks much for writing this up. The new back makes total sense now, something Phase One's initial marketing efforts failed at.
    Quote Originally Posted by Bill Caulfeild-Browne View Post
    Great articles, Doug - thank you!
    Quote Originally Posted by GrahamWelland View Post
    Not only great but entertaining too:

    ”cutting these tails turns out to significantly improve the rendering of problematic subject matter, turning dark leather red, skies purple, and dark skin tones slightly Oompa-Loompa”
    Thank you for reading and your kind words. When I tried to have my wife read it she fell asleep, so it's reassuring that at least other photo nerds found it worth a skim .
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by Shashin View Post
    Doug, you may want to run a spell checker through your text. I found one obvious typo, I am sure there are others: "New Color Response: This means taht, among other things..."
    Fixed. Tahnks!
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183
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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Doug..... an incredible effort on your part and greatly appreciated. There really does seem to be some improvement albeit not in relation to the price I would have to pay for the upgrade. For me its much better to wait for the IQ4 with the upgraded sensor and casing and maybe, even, Gorilla glass on the LCD screen.

    Cheers....

    Victor
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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by vjbelle View Post
    Doug..... an incredible effort on your part and greatly appreciated. There really does seem to be some improvement albeit not in relation to the price I would have to pay for the upgrade. For me its much better to wait for the IQ4 with the upgraded sensor and casing and maybe, even, Gorilla glass on the LCD screen.

    Cheers....

    Victor
    I agree Victor on all points. Great article, sit out until IQ4 and presumably the new bayer array being the norm and tougher LCD glass. Regarding the latter, www.screenpatronus.com can provide screen protectors. I've used them on all of my P+ and IQ backs.
    Remember: adventure before dementia!

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Nice article Doug! Very helpful in conceptualizing the new back and putting it in perspective, something the Phase marketing materials didn't do such a great job of.
    -Todd

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by vjbelle View Post
    Doug..... an incredible effort on your part and greatly appreciated.
    Quote Originally Posted by GrahamWelland View Post
    I agree Victor on all points. Great article
    Quote Originally Posted by tcdeveau View Post
    Nice article Doug! Very helpful in conceptualizing the new back
    Thanks gents. I'm glad you enjoyed reading it.
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Having read the article, I came away with a couple of important concepts. The Trichromatic back is better because Niels says it's better and we should listen to Niels because Niels is like grandpa and grandpa knows what he's talking about!

    That's pretty much all I needed to know.
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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Thanks, Doug. That's what I wanted to see!

    --Matt

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Thanks Doug for these pieces. I found them very informative. I am waiting on shipment of my Phase One kit with Trichromatic back, and an accompanying Alpa STC kit for good measure, this week. Haven't shot MF in almost three decades, but am looking forward to it again.

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by Abstraction View Post
    Having read the article, I came away with a couple of important concepts. The Trichromatic back is better because Niels says it's better and we should listen to Niels because Niels is like grandpa and grandpa knows what he's talking about!

    That's pretty much all I needed to know.
    I understand that explanation much better than the allegedly fake science graphs.

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    In addition to software making the output of a normal bayer look better, the UV/IR cut filetr ona sensor also would take care of the issues with UV and IR contaminating a sensor.

    Does the trichromatic sensor ships without an UV IR cut cover glass (since according to the articles the CFA has no sensitivity to UV or IR it does not need it?)?

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by hcubell View Post
    I understand that explanation much better than the allegedly fake science graphs.
    It's the only explanation that matters.

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by Abstraction View Post
    It's the only explanation that matters.
    Doug’s explanation helped a lot. It explains why as a Brit I’ve struggled for decades with capturing the accurate colour of our blue bells. They always end up pink or purple, the IQ3 trichromatic definitely nails that colour aberration with all current cameras.
    Remember: adventure before dementia!

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    From the available info it seems that expense, and slightly more noise at high ISO, are the only real downsides ?

    But knowing that using a CFA is a zero sum game, some colors must render worse for others to render better.

    Jim

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    Quote Originally Posted by drunkenspyder View Post
    Thanks Doug for these pieces. I found them very informative. I am waiting on shipment of my Phase One kit with Trichromatic back, and an accompanying Alpa STC kit for good measure, this week. Haven't shot MF in almost three decades, but am looking forward to it again.
    I look forward to your hands on testing and feedback! I hope you'll post some photos!
    Doug Peterson , Digital Transitions | Email
    Dealer for: Phase One, Mamiya Leaf, Arca-Swiss, Cambo, Eizo, Profoto
    Office: 877.367.8537. Cell: 740.707.2183

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    Some reflections lime fruit colour

    Hi,

    This is a bit a technical posting.

    Anyway, Doug Peterson has posted two articles describing the differences between the Thrichromatic and traditional designs. The most obvious example he shows is lime fruit, shot on the Trichromatic:

    and the IQ3100MP


    That would indicate the rendition of lime fruit is critical because the surface of the lime has high near IR content, while the fruit is very green. I don't own either the IQ3100MP or the Trichromatic, but I could buy a couple of lime fruits at the grocery. I also have a few cameras with traditional CFA designs. The cameras i chose for this small comparison were:

    • Phase One P45+ on a Hasselblad with Zeiss Sonnar 180/4, the P45+ is known to be a bit tricky in colour.
    • Sony Alpha 900, the camera that a few colour experts regard to have the best CFA design amoung the commercially available cameras, used with a Sony 70-300/4.5-5.6 G lens.
    • Sony Alpha A7rII, my most used camera, with the Zeiss 35-135/3.3-4.5 Sonnar mounted on the HCam Master TSII adapter.


    I included a ColorChecker Passport in the setup. It was used for three purposes:

    • Setting white balance
    • Adjusting exposure so we would get similar mid tones
    • Generating DCP profiles for each camera setup


    Development was in LR CC Classic, the P45+ image was also developed in Capture One. The results are shown below:



    • Top left: P45+ with LR CC
    • Top right: Sony Alpha 900 with LR CC
    • Bottom left: P45+ with Capture One
    • Bottom right: Sony A7rII with LR CC


    One possible observation is that the Capture One processed image has more snap, but that is probably due to it using a higher contrast tone curve.

    I am more concerned about the rendition of the lime fruit peel, and that seems to be very accurate on all the images. How can I tell? Because I have measured the colour inside the marked areas with a spectrometer. In all the images a small area was selected, where "a" and "b" channels (in Lab mode) were replaced with "a" and "b" values calculated from spectral data. So, texture is coming from the original image but colour is actual colour of the fruit peels. I have done this on the lime in front and the one in the back. The A900 image (top right) has thin green marker on the patched areas.

    These patches are not really different from the rest of the fruit, that indicates that colour reproduction is near perfect.

    I used two Elinchrome flashes with soft boxes for illumination and in this light it seems that near IR contamination of the greens was not a problem, at least not with my setup. I don't know what light source Doug has used.

    What my samples illustrates is that a wide variety of traditional CFAs handle lime green very well, at least under studio flash.

    Best regards
    Erik
    Last edited by ErikKaffehr; 28th October 2017 at 01:41.

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    Re: Phase One Trichromatic In Depth Article with Raw Files

    I'm starting to think being color blind is maybe not so bad after all
    http://www.elundqvist.photo
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