How do I focus and do rangefinder coupling?
Quick Zone focusing method:
Estimate the distance between you and your subject. Switch the focusing lever to the corresponding focus zone by matching the focusing scale and take the photo. For depth of field of each zones, please refer to the “Depth of Field Chart” below.
Quick Zone focusing with rangefinder assistance (only if your camera supports rangefinder coupling):
Calculate the distance you want between you and your subject, switch the focusing lever to the corresponding focus zone. Look through your camera’s rangefinder, match the rangefinder images by moving closer to/further away from your subject and take the photo.
*Ordinary rangefinder focusing (only if your camera supports rangefinder coupling):
Look through your camera viewfinder, simply switch the focusing lever to match the rangefinder images, and take the photo.
Depth of Field chart
@f/2.8
Zone 0.8: 0.76-0.84m
Zone 1.5: 1.36-1.67m
Zone 3: 2.49-3.77m
Zone infinity: 7.38-inf.
@f/5.6
Zone 0.8: 0.72-0.89m
Zone 1.5: 1.25-1.88m
Zone 3: 2.13-5.08m
Zone infinity: 4.89-inf.
@f/11
Zone 0.8: 0.66-1.02m
Zone 1.5: 1.07-2.52m
Zone 3: 1.65-16.6m
Zone infinity: 2.92-inf.
*Circle of Confusion: 0.025mm