Quote Originally Posted by Michael Hoth View Post
thx,i used a step wedge-negative placing in the hasselblad filmholder, photographing a white card placing on zone X; did this with 5 films! maybe the displacing of the negativ leads to an uneven illumination (i lost steps 30/31 and 1/2)
should i repeat shooting 5 films
I downloaded your photo and looked at pixels in the two #16 wedges in Gimp. Densities by the centre are the same, but they're different by the outside. No need to repeat development. Just re-measure the wedges at the inside.
By eliminating the jump, you can compute CI accurately.

HTH,

Mark Overton