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.

[table]
[tr][td]Tilt angle (t)[/td][td]Correction (c)[/td][/tr]
[tr][td]7.5[/td][td]0.7[/td][/tr]
[tr][td]5[/td][td]1.0[/td][/tr]
[tr][td]0.0[/td][td]1.65[/td][/tr]
[tr][td]-2.5[/td][td]1.95[/td][/tr]
[tr][td]-7.5[/td][td]2.55[/td][/tr]
[tr][td]-10.0[/td][td]2.85[/td][/tr]
[/table]

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:

[table]
[tr][td]Tilt angle (t)[/td][td]Correction (c)[/td][/tr]
[tr][td]12.5[/td][td]0.09[/td][/tr]
[tr][td]-15[/td][td]3.48[/td][/tr]
[/table]

Viele Gr?º?üe
Carsten