DARKROOM AUTOMATION F-STOP, Инструкция по эксплуатации

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a. Press the mode key and use the up down keys to set the timer to a
progressive burn of
p1.0
stops;
b. Cover the foreground, lower sky and clouds;
c. Press the exposure key to make the additional 1 stop burn for the upper sky.
Paper Speed Adjustment
The paper speed adjustment compensates for changes in paper sensitivity.
Photographic paper loses speed as it gets older - often 0.3 stops between opening
a new box and removing the last sheet. If you keep notes on exposures - or keep
print exposures in memory - it may be easier to use standard exposures and enter
the state of the paper’s speed at the beginning of a printing session.
To use this feature, make a reference print on your present paper at reference
conditions of enlarger height, lens opening and exposure. Either a step tablet or a
uniform 18% grey work best for a reference print. Keep this print as your 0.0 stop
adjustment reference. Check the paper every month or so by making a 0.1 stop test
strip print around the reference exposure and see if the paper has lost or gained
sensitivity by finding test strip that matches the reference print; Enter the exposure
change required at the paper speed adjustment display
J.0
. Speed can be
adjusted from -3.0 to +3.0 stops.
When an exposure is made the starting count-down time will reflect the change in
paper speed.
Drydown
The drydown percentage must be entered before you start a print. Advance to
drydown
% 0
with the menu key and enter the drydown percentage 0 to 30%. All
printing times will be shortened by this percentage to compensate for print
darkening - this will be reflected in the displayed starting time when an exposure is
made.
Drydown compensation varies with the paper, paper contrast grade, evaluation
lighting, toning, ferrotyping, drying temperature, mounting method, covering glass
and display lighting. Tests should be run to determine the degree of drydown
compensation required, if any.
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