d*TREK does this - it's dtorient program works for any goniometer as well. Or use CrystalClear which came with the detectors at U of Texas. You probably have both these programs already. Jim On Mon, 21 May 2007, Bryan W. Lepore wrote: > are there any free programs which, given a diffraction image, will calculate > the rotations necessary to align any of the reciprocal space axes w/ the > beam? > > i looked through mosflm and dataman, so unless i missed it... > > -bryan >