User's Manual

Detailed User Guide 23
© 2014 P romote Systems
cases please do not use the average scene metering from step 3, and instead set the exposure value
as appropriate for scene shadows or scene highlights respectively.
9. Set the "Step" setting on the Promote Control to 1.0EV for general HDR photography. You may want
to use a smaller "Step" value for a fine-grained tonal control.
10. Begin with a "Total Exposures" setting set to "05" or "07", depending on the subject contrast and
tonal range to be covered. The more contrast the subject exhibits, the more steps or total exposures
will be needed to sufficiently cover the subject tonal range. For example, setting this value to "07"
with a step of "1.0EV" will result in 7 images taken as follows:
-3 EV steps from the "Mid Exposure" shutter speed
-2 EV steps from the "Mid Exposure" shutter speed
-1 EV step from the "Mid Exposure" shutter speed
The "Mid Exposure" shutter speed
+1 EV step from the "Mid Exposure" shutter speed
+2 EV steps from the "Mid Exposure" shutter speed
+3 EV steps from the "Mid Exposure" shutter speed
With "Shadows" chosen for the "HDR Start Point" and the same set of exposure values, the following
7 images will be taken:
The "Lo Exposure" shutter speed
+1 EV step from the "Lo Exposure" shutter speed
+2 EV steps from the "Lo Exposure" shutter speed
+3 EV steps from the "Lo Exposure" shutter speed
+4 EV steps from the "Lo Exposure" shutter speed
+5 EV steps from the "Lo Exposure" shutter speed
+6 EV steps from the "Lo Exposure" shutter speed
Similarly, with "Highlights" chosen for the "HDR Start Point" and the same set of exposure values, the
following 7 images will be taken:
-6 EV steps from the "Hi Exposure" shutter speed
-5 EV steps from the "Hi Exposure" shutter speed
-4 EV steps from the "Hi Exposure" shutter speed
-3 EV steps from the "Hi Exposure" shutter speed
-2 EV steps from the "Hi Exposure" shutter speed
-1 EV step from the "Hi Exposure" shutter speed
The "Hi Exposure" shutter speed
Generally choosing more steps is better, because you are then able to select the images you need
from the resulting sequence. However, taking more than 11 total exposures with a step of 1.0EV or
higher is rarely useful, and should only be used for very high contrast scenery, or when there is no
time to reliably measure a start exposure.