XF Camera System Manual |
AF Compensation with Focus Trim
It is possible to fine-tune the AF sensor’s accuracy with two methods. You can
either use a fully manual procedure as described on this page, or use the semi-
automatic way with the Focus Trim Tool as described in the following chapter.
Phase One recommends that you use the Focus Trim Tool.
The Focus Trim feature adjusts the plane of focus forwards or backwards by
the set amount and the focus point will then be adjusted by this trim amount
every time autofocus is initiated.
Adjusting Focus Trim manually
Phase One recommends making adjustments using the Spot AF mode with
the camera and intended lens on a tripod, either at the location (under the
anticipated lighting conditions), or at a similar distance with as close to the
anticipated conditions as possible.
To set the amount of front or back focus compensation, press the Rear Key to
enter the Camera Menu, and select Capture Setup > Focus Trim > – / 0 / +.
The amount can be adjusted in steps of ±5 pts.
Make initial adjustments in multiples of three (±15 pts.) or five steps (±25 pts.)
and then fine-tune in smaller steps until the desired result is achieved.
Setting negative (-) Trim values moves the focus point forwards of the default
(factory set) focus point (0). Selecting positive (+) Trim values moves the
focus point backwards of the default focus point (0). Therefore, if the focus
point is in front of the intended point of focus, continue to adjust by increasing
the positive (+) value.
To remove the compensation settings, set the Trim value to zero (0).
Focus Trim setting
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