Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: billy on October 15, 2007, 11:01:06 pm

Title: Phase P21 back/ green cast
Post by: billy on October 15, 2007, 11:01:06 pm

I know I have read about this before, but searched and found nothing. I have a job tomorrow and a new P21 back, when I shoot tethered I get a green color cast that fixes itself when I neutralize off grey card but shoots fine when to a CF card. whats the problem? I am using the P21 natural portrait profile in C1 Pro.

Title: Phase P21 back/ green cast
Post by: billy on October 16, 2007, 12:20:05 am

help

Title: Phase P21 back/ green cast
Post by: pixjohn on October 16, 2007, 12:50:06 am

try the phaseone forums?

I shoot Leaf but I believe you can do a white reference to correct color cast?

Title: Phase P21 back/ green cast
Post by: Joe Behar on October 16, 2007, 08:57:36 am

Quote

I know I have read about this before, but searched and found nothing. I have a job tomorrow and a new P21 back, when I shoot tethered I get a green color cast that fixes itself when I neutralize off grey card but shoots fine when to a CF card. whats the problem? I am using the P21 natural portrait profile in C1 Pro.
[a href=\"index.php?act=findpost&pid=146257\"][{POST_SNAPBACK}][/a]

Billy,

When you shoot to a card the back is most likely set to auto white balance. When you shoot tethered you need to do an initial grey balance and then set that balance as the default. From then on, unless you delete your software preferences that white balance will be what shows up everytime you shoot.

Title: Phase P21 back/ green cast
Post by: pss on October 16, 2007, 12:58:00 pm

Quote

I know I have read about this before, but searched and found nothing. I have a job tomorrow and a new P21 back, when I shoot tethered I get a green color cast that fixes itself when I neutralize off grey card but shoots fine when to a CF card. whats the problem? I am using the P21 natural portrait profile in C1 Pro.
[a href=\"index.php?act=findpost&pid=146257\"][{POST_SNAPBACK}][/a]

you are not getting a green cast, if you notice the color temp slider in C1 is all the way to the left.....your white balance is just set all the way to the left....check the settings on your back....

Title: Phase P21 back/ green cast
Post by: clawery on October 16, 2007, 10:35:02 pm

Billy,

There are a few settings I might have you check, but it would be quicker to do it over the phone.  Give Tim Palmer (770)597-1098 or I (Chris Lawery) (404)234-5195 a call and we'll walk you through it.

Chris Lawery
Capture Integration
www.captureintegration.com