Quick post... use the H3D-39mp as DSLR is fine. When used with any technical camera, ie Cambo WRS, Alpa... you are on your own! I now have a 6months old 39mp back that doesn't work well with technical camera and require a special cable release, which "may be" will rectify the matter. I tested with DEMO unit BEFORE purchasing/upgrading and no specific problem. But once I one this "new" back, I discover strange magenta casting. Also strange is that my friends in US/Canada and AU, who still uses Hasselblad 39mp back all don't have any issues with technical cameras ie Linhof, Sinar, Rollie, Cambo, Alpa, Horseman.
So, beware... please test your 39mp first with a technical camera if you intend to buy. If no intention in the future, then DSLR is fine as a 39mp just as it is.
(PS: David, you can voucher on this!)
I'm wondering if the Magenta cast is the same thing I've ran into with the Kodak chips. It happened to my PhaseOne and now my HD3II 39 on an Arca-Swiis view camera with copal shutters.
There is a feature in Phocus called Custom White Balance.
Here is the only instructions I've found on this:
Custom white correction
This feature allows you to correct for things like cast issues when using tilt and shift. User interface for this has been added to the lens correction tool. The procedure is as follows:
1) Make a calibration image of a neutral gray surface - the best results are obtained by using an opaque filter. The capture can be made either tethered or untethered.
2) The calibration image needs to be available as a 3F file so if it was captured untethered you will need to import it.
3) Load an image where you'd like to apply the correction
4) Select the thumbnail of the calibration image and click the Create button found in the Lens Correction tool
5) You will be prompted for a name of the correction - it's a good idea to use it to describe things like the lens and aperture used.
6) You have now created a custom white correction - to see it's effect on the currently loaded image check the Custom white checkbox.
7) To apply the custom white correction you can follow the same methods as when applying any other adjustment to a range of images using either the Modify dialog or the Modify Lens Corrections of Selected Files option in the Lens tool preset menu.
If this correction is one that you might want to save for future use you can simply create a Lens Adjustment preset with the correction active.
This applies to Phocus 1.1 or later MAC ONLY.
The current Phocus for the PC does not have tis feature yet. We have to wait for version 1.1 to come out.
However if you are a PC person like myself the custom white balance feature does work on FlexColor.
The cable release problem I never encountered with the Hasselbald but I did with the Phase.
If you are using copal shutters use a standard cable release and a cable from the shutter sync to one of the ports on the back. You may need to go into the menu on the back and select the proper shutter style. I think it defaults to the HD3II.
If you are tethered using Flexcolor You may be able to change the shutter style through the software. I don't know how to do this through Phocus though.
I hope this helps,
Bob
I hope this solves your problem.
Bob