FOR THOSE SHOOTING TECH CAMERA WITH MFDB:
In an email exchange with Rene at Cambo (a chap that I have always found very helpful and knowledgeable), he confirmed a point that was raised by a buddy of mine, Chris Snipes:
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Hello Jack,
the Lens Cast is a phenomena that occurs with any digital back make and shows with ultra short focal lengths as well as with rather firm shifts,
and not necessarily with the more normal focal lengths.
this is NOT related to the make of the camerabody. It occurs with Alpa, Arca, Cambo, Horseman, Linhof, Sinar similar with the same lenses.
Lenscast is actually a wrong name, as it is not the lens who casts an effect, but it is the behavior of the CCD's. It is also different from one CCD to another CCD,
even within the same make and size...
PhaseOne uses the LCC (Lens Cast Calibration)
Hasselblad uses the Custom White
Leaf uses their Custom Gain
all for the same purpose.
Every architectural shooter works like that, it is just part of the work flow, compare to the necessary pulling and inserting the dark slide in the film days...
best regards,
Rene Rook
Cambo
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I think that for anyone considering using a Tech Pan camera/MFDB for AP, this element of the work flow should be considered.
Are those of you using a TechPan shooting a Lens Cast file for every setup/scene?
Are those shooting DSLR doing the same?
(I've used the ExpoDisc for my landscape work to get a good WB.)
Jack