Edmund, I've checked the RAW file. Actually, the stripes or striations can be seen in my monitor even before you push the exposure. It's more visible even when pushing about two stops but I can clearly see the the stripes at 50% magnification.
You should open a support case at phaseone.com. They will help you.
/Samuel
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Samuel,
Thank you for your confirmation of my own findings. I had a Phase One case open. They CLOSED my case as soon as I sent them that file !!!! They refused to acknowledge that this is a clear indication that the back has issues at 400 ISO, and pretend it's only a 800 ISO underexposed problem. I don't know what is the matter here but I'm feeling increasingly unhappy, even more so as I paid for the VA option. The rep agreed now to send the back to Denmark, we'll see if Phase actually does something to fix the issues, but if they are in denial maybe having some pro photographers using Phase products look at that file and chiming in might help ...
if this is back is defective, as I believe, then it needs to be repaired or replaced. If as Phase believe it is in spec and this is Phase P45+normal quality at ISO 400 then I think prospective buyers deserve to be shown what problems they can expect.
Here is what they wrote me:
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Hi thanks for the image - i have looked at the image and i have posted Olivier from Prophot some suggestions and answers. I have also suggestted him that you can try one of their P 45+ to compare.
What i have written Prophot is that a 1-2 f-stop under exposure and then at ISO 800 leaves the signal/noise ratio in a very low position where you will get difficulties. The sensor will only use a minimum of the dynamic range that way. Instead we recommend that you get a image correct exposed and then afterretouch whatever changes you may have. I have also written that maybe you should try a P 30+ or P21+ instead - these camerabacks are more optimized for higher ISO (P 30+ ISO 1600) and they both have microlenses in case you need to shoot in dark invironment.
About the 3.7.7 crash when processing can only be related to your local Mac - please ensure that RAM and CPU are performing well and the harddrive as well. The pattern noise supression will be supported in the final 3.7.8 version that will be release in the comming weeks.
Thanks
Customer Support
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Here is my previous message, when I sent them the file posted above.
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Here is another image @ISO400 with about 1 stop headroom. You will see the horizontal lines again. I suggest we do something about this, I have lines or blooming in a lot of my images even if they are not quite as visible immediately.
By the way, C1 3.77 is quite unstable when processing my P45+ files on both my comps, Mac Intel and G5, under 10.4.x, and also crashes predictably if I try to enable pattern noise reduction.
Edmund
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