I find the focus at close distance is quite critical even at, say f6.3 -- when I have a flash attached for fill-in outdoors I find I cannot read the rangefinder scale so if I 'guess' the photos are often 'soft' in focus -- then I thought of a way -- set the distance you want on the lens FIRST, say 1.2 metres, then set the same distance on the rangefinder scale then approach the subject and 'sway' back and forth watching the rangefinder spot -- when the two images are co-incident press the shutter release. I will see if I can upload a 'soft' photo where the focus is just out.