7
3. Activate the live view of your camera.
4. Set the distance of 1.5m on the lens focus ring and use the zoom level at 45mm.
This setting must not be changed during the adjustment process.
5. Set the largest aperture of T 2.6 on the aperture ring.
6. Obtain maximum image sharpness on the live view by varying the distance
between the test chart and the camera. Set the live view to maximum
magnifi cation in order to obtain the highest level of precision when checking
image sharpness.
7. Now re-measure the distance between the image plane mark on the camera body
and the test chart (= the actual distance).
8. If the distance has changed, the fl ange focal distance of the lens must be
adjusted by using the colored shims.
9. You fi nd the differences between the actual and the theoretical distance to the
test chart in the appendix (page 10) to calculate the resultant change in the
fl ange focal distance.
10. Now remove the lens from the camera after you have defi ned the number and
thickness of the shim(s) needed.
11. Remove the EF mount and EF adapter ring from the lens barrel (cf. section C 2-4).
