Initially, Zeiss sent me some data sheets which referred to "the front vertex of the lens", or something like that. When I asked what the vertex is, I received this very helpful info. The data relates to C T* lenses of the focal length mentioned.
Not sure why the nodal point is irrelevant. It seems the answer is to ask the manufacturer of each lens where the axis of mevement should be!
Roger
Dear Mr. Hayman,
Sorry for leaving you in trouble with our lens related data, forgetting that this is not so easy to comprehend for you. Therefore the following data are all related to the
film plane, which you can easily identify at the camera body.
To have a constant relationship of foreground and background details during panning movements of the camera in panorama shooting, the axis of movement should be located
at:
93.6 mm in front of the film plane for your 40mm
99 mm in front of the film plane for your 80mm
110 mm in front of the film plane for your 150mm
By the way: this has nothing to do with the nodal points ! Unfortunately it seems to be impossible
to exterminate this wrong concept from the literature. The projection centre of the lens is the exit pupil.
One has to turn around an axis through the exit pupil to make a detail of the foreground not move against the background.
With best regards
Dr. Hubert Nasse
Camera Lens Division, Laboratory
phone 49-(0)7364-20-2846
FAX 49-(0)7364-20-4045
e-mail
nasse@zeiss.de
Internet
www.zeiss.de/photo