By
Les De Moss/DigiGraphics
(This article was written prior to the full adoption of
digital imaging, dealing with issues affecting the quality
of optical reproductions made from film. While many more
things are possible in the digital age, the fundamentals of
quality image capture and enjoying a successful relationship
with a lab remain the same...)
A
professional color lab can help you get the most from your photography.
While it may take a little extra effort to work with a one... learning the
services and properly preparing your order, the results are superior
compared to consumer and mass photo-processors.
Remarkable things can be achieved from your images. The key to
consistent satisfaction is knowing the capabilities and limitations
of the various services, films and papers used in modern photography.
The care you use in shooting and selecting your images is just as important
as the lab work that follows. Read this guide and
see us with your ideas. We will help you complete the "Circle of
Quality" from exposure to print.
The Lab is your partner
Always ask the lab to help identify potential problems that may
be encountered when reproducing your original slide or negative.
We suggest you bring several originals so that comparisons can
be made. If you have proof prints or previous enlargements, bring
those along as well. These materials help to identify what you
like, and allow us to help you select originals that will make
the best possible reproductions.
Good originals make good prints
If you own quality stereo equipment you know that a bad recording
results in poor sound, even though your equipment may be capable
of superb reproductions. This offers a good analogy for photography;
your original is the recording, the lab is the electronics, and
when combined they'll produce either music or noise.
Factors that affect the quality of your originals
and subsequent quality of reproductions are:
1. Correct exposure
2. Even lighting/low contrast
3. Good Highlight Detail
4. Critically sharp focus
5. Proper selection of film
6. Quality film processing
But it looked great in the viewfinder
We often say that "everything looks great in the viewfinder".
One key to successful photography begins before you click the
shutter, in a process we call "translation". Translation
means "seeing" the image not as it looks in the viewfinder,
but as it will look when reproduced. Several changes take place
that alter the character of the image seen in the viewfinder.
Professional Photographers are well paid for their ability to
translate. Common translations are:
1. Lost dimension. 3D becomes 2D. Compensate with aperture adjustments
(depth of field).
2. Added contrast. Highlights become lighter, shadows darker.
Reduce contrast by using a "flash fill", otherwise
it is almost always better to expose for highlight detail, allowing
shadow areas to "fall".
3. Grain/Pixels. The actual structure of the image becomes evident when
enlarged. The slower the film speed (ISO), the finer the structure. Always use the slowest
ISO speed possible.
4. Stopped motion. Compensate with panning or longer exposures
to simulate motion.
5. Cropping. The minimum crop taken when making standard size
enlargements. Digital and 35mm originals are not proportional to many print
sizes, and must be cropped in order to fit.
"Saving it in the lab"
Manipulating an image in the lab usually involves correcting
an imperfection which, ideally, would not be present in the original.
While manipulation may completely correct many imperfections,
some involve making sacrifices to overall image quality. Common
imperfections helped by manipulation are:
1. Under/over exposure. With or with out correction, grain, color,
color saturation, and contrast may be affected. Underexposure
is usually preferable to over exposure; Humans are more sensitive to
highlight detail than shadow detail.
2. High contrast. Highlights and shadows that lack good detail
can be improved by dodging and burning.
Grain, color saturation and contrast may be affected.
3. Color shifts. Correction of color involves adding or subtracting
color in the printing process.
This adds or subtracts specific colors from the entire scene,
thus affecting all colors in some way (no longer an issue using digital
tools that pinpoint discrete colors for correction).
4. Severe cropping. If severe cropping is needed to achieve good
composition, grain is increased, sharpness, color saturation,
and contrast are reduced.
5. Wrong film speed setting. Compensated with "push/pull"
processing. Although this procedure can save an important roll,
color, contrast and grain are affected.
6. Wrong film used. Daylight film used indoors without a flash,
and indoor film (tungsten) used outdoors without filtration produces
severe color shifts. Printing corrections can be made but overall
color suffers.
Digital technology
Computerized manipulation of an image is an effective and extremely
precise way in which to to alter, enhance or correct some aspect
of the original film.
With the help of super fast computers and imaging software
like Adobe Photoshop, we can make alterations to an image
that go far beyond what's possible using traditional
darkroom techniques.
Cost versus quality
Most professional labs offer many different reproduction services,
designed to satisfy various cost/quality requirements. Every
increase in quality requires additional time and materials, thus
increased cost.
"Under Ordering", in hopes of reducing costs, will
frustrate both you and your lab. Always order the service that
best suits the quality you require. Inexpensive machine-made
prints are not suitable for display, just as custom prints are
not needed for a family snap-shot album.
Material characteristics
Present day photographic films and papers are truly exceptional
in their ability to capture color, tone and texture. As good
as they are, however, limitations do exist. The more you know
about how film and paper work, the better equipped you are to
plan, capture, manipulate, and produce successful photographic
images.
An image captured on film never truly looks "exactly"
like the original scene, regardless of the film you use, or how
"good" the slide may look (in many cases, slides actually
look 'better' than the original scene due to an increase in color
saturation and contrast).
Likewise, a print made from a slide may look great standing alone,
however, an exact match to an original slide is technically impossible.
Contrast, luminescence, color and resolution are all altered
in the process of transferring an image from one material to
another. Just as we accept the original slide as an "interpretation"
of the actual scene, we must also acknowledge that a print is
an "interpretation" of the original slide, not an exact
replication.
Understanding the procedures involved
in capturing and reproducing photographic images, and having
realistic expectations, will go a long
way toward increasing your enjoyment of photography, and satisfaction
with your lab.
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