Mamiya RB67 Pro SD User Manual page 35

1. After focusing the lens, read the exposure
compensation factor on the scale.
For example, assuming that the focus was
adjusted with the 127mm lens, the result will
be as shown in photo above.
Look for the same pattern in the bottom
column where the side panel lines meet the
127mm lens scale. The numerical value of
that pattem (+1 in this case) is the
exposure compensation value.
Maximum close-up photography table with
2. Change either the shutter speed or the
aperture for exposure compensation.
When the exposure compensation value is
+ 1, open the aperture one step, or slow the
shutter speed 1 step. For a 0.5 step cornpen-
sation. use the half-stop aperture scale settings.
For example, if your exposure meter shows
an exposure setting of (1/60 sec. at f/16), it
must be adjusted in the case of the + 1
compensation value to (1/30 sec. at f/16) or
(1/60 sec. at f/11).
33
When using the 50mm and 65mm lenses
l
closer than 1 meter (3% ft), it is necessary
to use a lens aperture of f/16 or smaller to
obtain satifactory lens performance.
Graduations on the upper side of the
l
distance scale represents the belows
extension values (mm).
This scale is used to obtain exposure
compensation values for close-up photo-
graphy with extension tubes.