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Author Topic: Centerfold on P45  (Read 5468 times)

Jae_Moon

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Centerfold on P45
« on: February 05, 2007, 06:59:45 pm »

I've been using P45 with both H2 (55-110mm) and Arca Swiss + Schneider Digitar lenses (35, 47, 90, 210mm) since last June. I've always used C1 as the Raw Converter and have not seen a single centerfold. I downloaded LR beta 4 after Michael confirmed that it supports P25 and P45 'unofficially.'

I was comparing the ease of use and the image quality between LR and C1. I was favorably impressed with LR's RAW conversion capability and decided to pre order the copy. I imported a couple thousand images into LR this morning, and I noticed many images have 'centerfold,' while I was working on asset management.  

I have not done any scientific analysis of these instances yet, but I see them with both H2 and Arca, with both wide and medium angles, and with both wide and narrow aperture settings.

Clearly, Phase One is utilizing its factory calibration data of individual image sensor to eliminate 'centerfold' within C1 program. I am not alarmed at all since I don't see anything when I use C1.

I was almost committed to use LR as my default Raw Converter until I saw this problem. I guess I am stuck with C1 for a bit longer.

Did anyone else encounter similar situations?

Jae Moon
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rainer_v

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Centerfold on P45
« Reply #1 on: February 05, 2007, 07:46:24 pm »

would you post an image where you see it?
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rainer viertlböck
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Caracalla

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Centerfold on P45
« Reply #2 on: February 05, 2007, 07:56:25 pm »

Quote
I've been using P45 with both H2 (55-110mm) and Arca Swiss + Schneider Digitar lenses (35, 47, 90, 210mm) since last June. I've always used C1 as the Raw Converter and have not seen a single centerfold. I downloaded LR beta 4 after Michael confirmed that it supports P25 and P45 'unofficially.'

I was comparing the ease of use and the image quality between LR and C1. I was favorably impressed with LR's RAW conversion capability and decided to pre order the copy. I imported a couple thousand images into LR this morning, and I noticed many images have 'centerfold,' while I was working on asset management. 

I have not done any scientific analysis of these instances yet, but I see them with both H2 and Arca, with both wide and medium angles, and with both wide and narrow aperture settings.

Clearly, Phase One is utilizing its factory calibration data of individual image sensor to eliminate 'centerfold' within C1 program. I am not alarmed at all since I don't see anything when I use C1.

I was almost committed to use LR as my default Raw Converter until I saw this problem. I guess I am stuck with C1 for a bit longer.

Did anyone else encounter similar situations?

Jae Moon
[a href=\"index.php?act=findpost&pid=99366\"][{POST_SNAPBACK}][/a]


:: Not yet and Hopefully NEVER!!! ::

Would you care to share some examples?

I am sure `H E L P` is around the corner!!!

REGARDS
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Jae_Moon

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Centerfold on P45
« Reply #3 on: February 05, 2007, 08:20:01 pm »

Will anyone tell me how to post images?

Jae Moon
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Jae_Moon

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Centerfold on P45
« Reply #4 on: February 05, 2007, 08:56:13 pm »

600 x 600 pixels. Image was processed in C1 and LR v. beta 4, with its default setting.

http://picasaweb.google.com/jaemoon007

Jae Moon
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Joe Behar

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Centerfold on P45
« Reply #5 on: February 06, 2007, 09:12:53 am »

jae,

Not trying to be difficult but...

The Phase One P45 does not have a centre seam and as such it does not need to be controlled...in either software or hardware.

LIghtRoom does not officially support Phase One files and as such any results you get from it cannot be used (in my opinion) to draw any conclusions about Phase One backs...or any other products that are not officially supported.
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Jae_Moon

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Centerfold on P45
« Reply #6 on: February 06, 2007, 11:53:28 am »

Quote
jae,

Not trying to be difficult but...

The Phase One P45 does not have a centre seam and as such it does not need to be controlled...in either software or hardware.

LIghtRoom does not officially support Phase One files and as such any results you get from it cannot be used (in my opinion) to draw any conclusions about Phase One backs...or any other products that are not officially supported.
[a href=\"index.php?act=findpost&pid=99436\"][{POST_SNAPBACK}][/a]


I do not know if P45 has a center seam or not FOR SURE since I am neither a chip designer nor have an inside track with Phase One. I am just reporting what I saw when P45 RAW files were processed with Lightroom Beta. There are definite 'centerfold' in some of the images. I also made it clear that LR supports P25/P45 'unofficially' per Michael.

I was making an educated guess that 'centerfold' exists in P45 RAW files and Phase One removes it using its factory calibration data of individual image sensor within C1. The alternate guess would be that Lightroom creates a centerfold during the conversion process, which I believe much less likely.

I didn't say it, and I still don't think it is a product defect in Phase One's part since P45 is being sold as a hardware/software package. The package is an excellent product and I am happy with it.

I was considering Lightroom for its integration of asset management function. Phase One may share its post processing know how with Adobe sometime so Lightroom can supports Phase One products 'OFFICIALLY.' Or, upcoming v4.0 would have better built-in asset management function.

JAE MOON
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godtfred

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Centerfold on P45
« Reply #7 on: February 06, 2007, 01:17:56 pm »

Quote
I do not know if P45 has a center seam or not FOR SURE since I am neither a chip designer nor have an inside track with Phase One. I am just reporting what I saw when P45 RAW files were processed with Lightroom Beta. There are definite 'centerfold' in some of the images. I also made it clear that LR supports P25/P45 'unofficially' per Michael.
[a href=\"index.php?act=findpost&pid=99472\"][{POST_SNAPBACK}][/a]
I too was under the impression that the kodak chips (as used in the P25 and P45, plus hasselblad backs) are seamless, and therefore free from centerfold issues. I believe I have read this in an article comparing Dalsa vs. Kodak a couple of years back, but of course I could not find it now  

Anyways, it is as likely that the issue is software related. I have found (for example) bridge to display my hasselblad .dng files with 2/3 of the frame jagged, while the first 1/3 had the image correctly displayed.

-axel
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Axel Bauer
godtfred.com H2|M679CS|P45+

Mark_Tuttle

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Centerfold on P45
« Reply #8 on: February 06, 2007, 06:02:02 pm »

I've just finished moving 647 captures from my P45 (shot in the last four days and a variety of lenses, lighting and subject) into Lightroom b4 and not one shows the problem you describe.

 Mark Tuttle

Quote
Clearly, Phase One is utilizing its factory calibration data of individual image sensor to eliminate 'centerfold' within C1 program. I am not alarmed at all since I don't see anything when I use C1.

I was almost committed to use LR as my default Raw Converter until I saw this problem. I guess I am stuck with C1 for a bit longer.

Did anyone else encounter similar situations?

Jae Moon
[a href=\"index.php?act=findpost&pid=99366\"][{POST_SNAPBACK}][/a]
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Mark Tuttle
MarkTuttle dot Net

Jae_Moon

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Centerfold on P45
« Reply #9 on: February 06, 2007, 06:12:09 pm »

Anyone else with P45 and Lightroom experiences?

One can download Lightroom beta for both Windows and Mac OS free for a quick test.

Jae Moon
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Jack Varney

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Centerfold on P45
« Reply #10 on: February 06, 2007, 10:59:29 pm »

Jae,

I tried a few P45 files in Lightroom B4 and in Camera Raw 3.6 and neither revealed a centerfold.

I do note that the centerfold in your example is not centered. I suggest this may be an artifact resulting from the manner in which Lightroom processes/assembles the image in memory. When scrolling through a very large image in Photoshop the screens are painted in sections (in quarters sometimes) with clearly defined vertical and horizontal lines (momentarily). Maybe there is some cause and effect here...  Don't know.
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Jack Varney

Jae_Moon

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Centerfold on P45
« Reply #11 on: February 07, 2007, 09:21:41 am »

Quote
Jae,

I do note that the centerfold in your example is not centered.
[a href=\"index.php?act=findpost&pid=99562\"][{POST_SNAPBACK}][/a]

Yes, it is centered. I just cut 600x600 pixels out of 39 M pixels.

I can only see them in blue sky shots, and maybe 10 -15 % of them.
CS3 beta Raw Converter also show the seams.

Jae Moon
« Last Edit: February 07, 2007, 10:18:58 am by Jae_Moon »
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