Unfortunately, the MF complaints we had with the X100 are unchanged with the X-Pro1. In order to check focus you can set the EVF to magnification mode easily enough by clicking-in the rear dial. Yet the camera insists on choosing its own aperture setting for the image preview - chosen presumably to maintain scene brightness in live view - which in some situations can make critical focus effectively impossible.
When pointed at a bright scene, for example, the camera will show you a magnified live view with the lens set to a narrow aperture, which of course shows a relatively wide depth of field. But if you actually want to shoot at a wide aperture (f/2.4 for example), you can easily be looking at a scene element that appears sharp in the magnified view but sits beyond the depth of field at the taking aperture. In this case, you'll end up with an out-of-focus image, despite it looking sharp in the magnified focusing view in the EVF. For a camera that is so clearly geared to enthusiasts and professionals, this is a critical misstep.
There is a workaround to this problem, although it's far from obvious. If you configure the Fn button for Depth of Field Preview, pressing it before you adjust focus sets the lens to the taking aperture. At this point, clicking in the rear dial for magnified view will allow accurate manual focus. Rather curiously, when set to video mode the camera honors the taking aperture in both normal and magnified live view all of the time, giving full time depth of field preview. I don't see why the camera can't behave this way in still image mode."
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