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8. The test print will show a series of strips of vary-
ing density, from very light (3 second exposure)
to very dark (18 second exposure). Somewhere
between — i.e., at about 12 seconds — you will
find a strip that has the desired density. This is
your correct exposure.
9. You are now ready to make a picture. Use the
correct exposure time as shown by your test
print. Develop, wash and fix, then examine your
print carefully.
If there isn't enough contrast, if it seems too
"flat'', make another print but this time use the
next higher contrast paper. If your original print
was on No. 2 paper, go to a No. 3 paper. If you
used variable contrast paper with a No. 2 filter,
try your next exposure through a No. 3 filter.
Conversely, if your print seems too "harsh" with
an absence of intermediate tones, lower your
contrast, using a No. 2 paper if your original
print was on No. 3, or No. 2 filter if your original
print was made through a No. 3 filter.
10. Once you get the "feel" of your negatives and
paper, you will be able to determine proper con-
trast and exposure without having to make test
strips for each print. The best way to learn to
print well is to print often. Don't try to ''mass
produce"' prints: it is better to make ten good
prints per session than thirty or forty mediocre
ones.
11. A valuable aid in producing better prints more
consistently and in less time is an Omega CS50
Timer with Auto Exposure control. This instru-
ment will determine proper paper contrast and
correct exposure time, automatically compen-
sating for changes in magnification, lens open-
ings, and film density.
Copy Camera Attachment
and Slide Copying
The C760 Dichroic Lamphouse with its built-in,
continuously variable color filtration and its even
"diffused" lighting is the ideal light box for copying
slides. To use the C760 Dichroic Lamphouse for
copying, remove it from the enlarger chassis and
place it on the baseboard upside down. The top of the
lamphouse has been carefully designed to lie ab-
solutely flat.
16
Place the slide carrier for your enlarger with the'
slide you are copying directly over the diffuser of the
lamphouse. (The power cord should be disconnected
during this operation and reconnected when you are
ready to begin copying your slide. If the enlarger is
plugged into an Omega timer, simply flip the switch
for power, otherwise plug the cord into any standard
outlet.)
The Omega Copy Camera Attachment should be used
to mount your camera directly to the enlarger chassis.
Use Cat. No. 429-065 for C760 and Cat. No. 429-062 for
C700, B600, B66, B22 and Concept Six models.
Instructions for using the Copy Camera Attachment
are provided with the unit.
In most cases, Kodak Ektachrome 35mm film Type
5071 will offer the best results since it is specifically
designed for slide duplication and balanced for light
with a color temperature of 3400° Kelvin, the rated
temperature of the C760 Dichroic Lamphouse at the
"OQ" filtration setting. Other slide films may be used
for special effects: however, these films tend to
produce a duplicate slide with higher contrast than the
original slide.
Adjusting the filtration of the lamphouse can correct
colors or produce dramatic changes in mood or
emphasis. Sometimes this treatment can make an
exciting picture from an otherwise unexciting slide. In
addition to changes in color, you can enlarge and
compose from sections of the original slide by raising
or lowering the carriage of the enlarger or by varying
the focal length of your lens. The possibilities for
creative controls and special effects with the Copy
Camera Attachment and the C760 Dichroic Lamp-
house are almost limitless.
Lamp Replacement
Super Chromega C760 Dichroic and C760 Diffusion
Lamphouses (both 120/60Hz and 240/50Hz units) use
an 85-watt quartz halogen lamp, (Cat. No. 471-400). To
replace this lamp, unplug the line cord and allow the
lamphouse to cool. Remove the top cover by lifting up
from the rear. Then remove the two knurled thumb
screws which hold the top cover of the lamp housing
and remove this cover. Push forward gently on the
lamp release with your finger. The lamp should lift
free of the socket.
Important: Handle the new lamp by the edge of the
reflector ONLY, preferably with a tissue or soft
handkerchief. This will avoid damage to the inside of
the reflector as well as preventing your fingers from
touching the glass lamp envelope. Moisture and oil
from your fingers can etch the glass and lead to
blackening and premature failure of the lamp.
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