Finally I have done the calibration for the Canon 15mm lens on a Canon EOS 5d slanted diagonally by 33.7 degrees. The calibration is done for an angle of 60 degrees (i.e. 6 pictures around). I haved used the method described by John Houghton at http://www.johnhpanos.com/epcalib.htm - 3. A DIRECT APPROACH - FOR SLRs ONLY.

Tilt angle (t) Correction (c) 7.5 0.7 5 1.0 0.0 1.65 -2.5 1.95 -7.5 2.55 -10.0 2.85

The straight line is described by c = 1.629333 -0.1232 * t

The correlation coefficient is r = 0.9998688

This is a very good correlation.

So there are two more calculated values:

Tilt angle (t) Correction (c) 12.5 0.09 -15 3.48

Viele Gr?º?üe

Carsten