When capturing images with shift movements, the shift value can be manually added to text fields in the Lens Correction tool's Movement tab. In addition to being used by that tool to optimize various corrections, the LCC tool can also adopt that data to optimize the LCC profile for the illumination falloff.
Vertical movements sometimes referred to as the rise and fall must be entered in the Y field. Rise should be recorded as positive (+) and fall as a negative (-) value, with the minus (-) sign being be used to indicate the movement in the opposite direction (indicating fall in this case). The field will not recognize the + sign, so it is not necessary.
For the purpose of adding data in the Movement tab, a parallel downwards shift of the IQ digital back is the same as a parallel upward shift of the lens and, therefore, should be recorded as a positive value.
Horizontal movements, left or right, should be entered in the X field. When operating the camera from behind (i.e., when looking at the subject), movements to the left should be recorded as positive (+), though as with vertical shifts, there is no need to add the + sign. Movements to the right should be recorded as negative and the (-) minus sign used.
Compensating for camera orientation
The shift X/Y entry fields in the Movement tab take image rotation into account. However, you may need to take note during capture if you have mounted the camera in a vertical position, especially when making horizontal movements left or right. If a vertical image is not automatically re-oriented in the Browser from the file's metadata, for example, then shift values for horizontal left/right movements must be entered in the Y field instead.
- Go to the Lens Correction tool and click on the Movement tab in the tool.
If the focal length and the taking aperture can be detected, the values will automatically be shown in the corresponding fields. Otherwise, enter the information manually.
Enter the shift data for the X and Y axis. Changing the shift parameters will have a positive benefit on the distortion and light falloff corrections in particular.