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Finding NPP without a pano head

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  • Finding NPP without a pano head

    See here for finding NPP without a pano head.
    http://michel.thoby.free.fr/Banknotes_intro.html
    Also see attached images for my old experiment.
    Click image for larger version  Name:	nodal-point-determination-1.jpg Views:	1 Size:	41.1 KB ID:	30388
    The setup.

    Click image for larger version  Name:	nodal-point-determination-2.jpg Views:	1 Size:	18.4 KB ID:	30387
    Test Target
    Click image for larger version  Name:	nodal-point-determination-3.jpg Views:	1 Size:	25.7 KB ID:	30390
    Find the tripod mount. Draw (use pencil, removable marker or a tape) a line
    parallel to rear screen, assuming perpendicular to lens axis.
    Click image for larger version  Name:	nodal-point-determination-4.jpg Views:	1 Size:	18.8 KB ID:	30389
    Draw a long line on large paper, and place the camera on paper aligning
    the lines on paper and camera base,
    Click image for larger version  Name:	nodal-point-determination-5.jpg Views:	1 Size:	50.1 KB ID:	30391
    Put the target pn paper, move to show up on screen of camera.
    Click image for larger version  Name:	nodal-point-determination-6.jpg Views:	1 Size:	47.0 KB ID:	30392
    rotate taget so that 2 blades overlap as one line. Mark the blade positions on paper.
    Click image for larger version  Name:	nodal-point-determination-7.jpg Views:	1 Size:	17.0 KB ID:	30394
    Repeat with a few more positions
    Click image for larger version  Name:	nodal-point-determination-8.jpg Views:	1 Size:	50.9 KB ID:	30393
    all lines should converge to a point which is the entrance pupil or NPP.
    Attached Files
    Fanotec
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  • #2
    Great method from Michel, much easier than using a laser.

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