Is mainly
used for correcting those converging verticals in pictures of buildings. The
reason you get sloping upright lines is because the camera has not been held
vertical to the view. View cameras
(large format) are the only cameras that can keep the film plane vertical and
look slightly upwards at the same time with out this distortion. You can buy a
shift lens which has the same ability or do it in Photoshop.
When
enlarging you negative you can correct this by using a tiling easel. Simply lift the easel by the appropriate
amount and rest it on a block. Remember that you need to lift the easel on the
side that has the converging lines. When doing this you should set the smallest
possible aperture providing the greatest depth of field. When making the
enlargement, part of the picture may be lost, it is just a case of cropping the
picture to make it square. After processing the exposure may be different
between the top and bottom this can be corrected by dodging to even up the
overall exposure.
Related posts:
Scheimpflug's rule.
Related posts:
Scheimpflug's rule.
