Cokin A123L WA1T123L Benutzerhandbuch
Produktcode
WA1T123L
48
A VERY HIGH-TECH
POLARIZING FILTER
The properties of a polarizing
filter come from the effect of
an aceto-butyrate film on po-
larized light. This film is extre-
mely fragile and is often not
completely flat when applied. It
is therefore pressed between
2 mineral glass lenses of very
high optical precision. The
reasons behind the exceptio-
nal optical quality of the COKIN
Z-PRO polarizing filters can be
seen in the details of how this
process is carried out.
filter come from the effect of
an aceto-butyrate film on po-
larized light. This film is extre-
mely fragile and is often not
completely flat when applied. It
is therefore pressed between
2 mineral glass lenses of very
high optical precision. The
reasons behind the exceptio-
nal optical quality of the COKIN
Z-PRO polarizing filters can be
seen in the details of how this
process is carried out.
•
The polarizing film is bon-
ded by machine to the two
mineral glass lenses with a
special optical glue, then
vacuum-sealed at a specific
temperature. This method as-
sures its flatness and elimina-
tes micro-bubbles sometimes
resulting from gluing, in the
same way that soaking slides
in oil before placing them on
a drum scanner allows for
elimination of possible scuffs
and imperfections. The seal
is assembled at the edges to
insure its durability and it is
polished all once again to gua-
rantee optimal quality.
mineral glass lenses with a
special optical glue, then
vacuum-sealed at a specific
temperature. This method as-
sures its flatness and elimina-
tes micro-bubbles sometimes
resulting from gluing, in the
same way that soaking slides
in oil before placing them on
a drum scanner allows for
elimination of possible scuffs
and imperfections. The seal
is assembled at the edges to
insure its durability and it is
polished all once again to gua-
rantee optimal quality.
•
This method also means
that the number of air-to-glass
surfaces , —a troublesome
source of flare— is reduced:
rather than six air-to-glass
surfaces, you have only two,
improving the performance
of the optical transmission.
Subjected to a continuous and
rigorous quality control, the
COKIN manufacturing process
guarantees you uncompromi-
sing image quality.
surfaces , —a troublesome
source of flare— is reduced:
rather than six air-to-glass
surfaces, you have only two,
improving the performance
of the optical transmission.
Subjected to a continuous and
rigorous quality control, the
COKIN manufacturing process
guarantees you uncompromi-
sing image quality.
•
From the very first image
taken, the benefits of using
this exceptional filter will
be obvious: absence of any
dominant tints (greenish, for
example), absolute neutrality,
sharpness and reinforced co-
lour saturation. All clear signs
of the durability and quality
of the COKIN PRO polarizing
filters.
this exceptional filter will
be obvious: absence of any
dominant tints (greenish, for
example), absolute neutrality,
sharpness and reinforced co-
lour saturation. All clear signs
of the durability and quality
of the COKIN PRO polarizing
filters.
Yellow
Red
Orange
Green
Yellow-Green
THE SPECTRAL sensitivity of panchromatic black & white
films deviates from
that of the human eye, especially in artificial light. The black & white specific filters
allow for the differentiation of colors translated into excessively close nuances of grey.
allow for the differentiation of colors translated into excessively close nuances of grey.
As for the sepia filters,
they are the answer for those wishing to recreate the images
from times past.
These
COKIN filters are completely unique.
They are not exactly the same as their Wratten® or Kodak® counter-
parts, but are optimized to obtain the best graphic effects possible in each of the 5 tints of the line.
Used in colour, they generate effects that are absolutely spectacular!
•
For understanding which filter to use with black & white photography, there is one simple rule : to brighten a colour
you must choose a filter of the same colour, and, to darken, you must use a filter of complementary colour. Thus, a
green filter will brighten vegetation and a yellow or orange filter will darken the sky.
green filter will brighten vegetation and a yellow or orange filter will darken the sky.
In black & white, everything being a question of nuances and contrasts, these filters constitute a
powerful method of expression, no matter what the subject is.
powerful method of expression, no matter what the subject is.
•
Yellow :
darkens blues, brings out clouds well, diminishes atmospheric haze. + 2/3 stop
•
Orange :
brightens reds, darkens violets and blues, reinforces contrasts in landscapes and architecture
photography, ideal for outdoor nudes. + 1
2/3
stop
•
Red :
strongly brightens reds, darkens blues and greens, creates spectacular stormy skies. + 3
1/3
stop
•
Green :
clearly brightens greens and darkens reds, ideal for nature photography. + 2
2/3
stop
•
Yellow-Green :
darkens blues and brightens green tones, very good filter in general for landscapes, works
wonderfully with portraits. +
2/3
stop
•
Sepia :
pronounced tonality, ideal for
reshooting black & white photos on the
copy stand. + 3
2/3
stop
•
Sepialight :
lighter tonality,
recommended for direct shoots.
+ 3 stop
THE COKIN GROUP has
some 80 employees, works with around
250 subcontractors, and its global network has more than 100
exclusive distributors. Whether it is research & development,
manufacturing, marketing, sales or product distribution, each of
the players in this human-sized company keeps a daily watch on
the firm’s rigorous quality standards and works to ensure the
best possible service for its customers.
exclusive distributors. Whether it is research & development,
manufacturing, marketing, sales or product distribution, each of
the players in this human-sized company keeps a daily watch on
the firm’s rigorous quality standards and works to ensure the
best possible service for its customers.
COKIN represents a wonderful demonstration
of what happens
when an outstanding manufacturer enhances its recognized
know-how by taking the opinions and comments of its numerous
professional customers into account. The quality of the company’s
products and its references are its greatest assets.
know-how by taking the opinions and comments of its numerous
professional customers into account. The quality of the company’s
products and its references are its greatest assets.
Impeccable
workmanship
Experienced
photographer
and brilliant in-
ventor, Jean Coquin is also at the origin of
an industrial process that distinguishes
itself in many special ways.
First – astonishing in this era of glo-
balisation – all of the optical products
in the Z-PRO line are manufactured in
France.
Second, COKIN makes itself what
constitutes its raw material – plates
of CR39
an industrial process that distinguishes
itself in many special ways.
First – astonishing in this era of glo-
balisation – all of the optical products
in the Z-PRO line are manufactured in
France.
Second, COKIN makes itself what
constitutes its raw material – plates
of CR39
®
glass – in one of the com-
pany factories in Alsace, France. This
approach, carried out at each level of
production, constitutes the best gua-
rantee of constant quality throughout
the entire manufacturing process.
approach, carried out at each level of
production, constitutes the best gua-
rantee of constant quality throughout
the entire manufacturing process.
•
The quality controls at COKIN are the
same that one encounters throughout
the precision optics industry; every
filter is individually inspected at least
4 times, every filter-holder 7 to 8 times.
The human eye remains in each case
the decisive element in this constant
search for quality!
the precision optics industry; every
filter is individually inspected at least
4 times, every filter-holder 7 to 8 times.
The human eye remains in each case
the decisive element in this constant
search for quality!
•
The manufacturing of filters alternates
between manual and machine operations.
Behind COKIN’s industrial achievements,
there are still women and men, shaped
by a remarkable company culture.
In addition, the qualified company per-
sonnel have an average of 25 years on
the job... An immense store of know-how,
a constant will to do the job well, a special
dyeing process carefully kept secret
– these are just some of the numerous
assets that explain the excellence of
COKIN products.
Behind COKIN’s industrial achievements,
there are still women and men, shaped
by a remarkable company culture.
In addition, the qualified company per-
sonnel have an average of 25 years on
the job... An immense store of know-how,
a constant will to do the job well, a special
dyeing process carefully kept secret
– these are just some of the numerous
assets that explain the excellence of
COKIN products.
COKIN, leading-edge
Research &
Development
for more than 40
years
COKIN
is one
of the rare
companies that really
lends an attentive ear to the wishes and
the questions of its users.
the questions of its users.
•
It is also one of the rare brands to
manufacture products conceived and
created by professionals, FOR profes-
sionals. The Z-PRO line is a remarkable
example!
created by professionals, FOR profes-
sionals. The Z-PRO line is a remarkable
example!
•
The Z-PRO filter-holders are a com-
bination of technology and industrial
accomplishment: each component,
each material, each piece, each coating
is a response to an astonishingly complex
set of specifications.
Thus, in this case alone, the choice of
a rather flexible high-tech material for
the strips used to tighten the filters, and
that of another material, more rigid for
the large plate, requires the expertise of
numerous specialists...
accomplishment: each component,
each material, each piece, each coating
is a response to an astonishingly complex
set of specifications.
Thus, in this case alone, the choice of
a rather flexible high-tech material for
the strips used to tighten the filters, and
that of another material, more rigid for
the large plate, requires the expertise of
numerous specialists...
•
When one realizes that over the
years COKIN has seen over twenty
imitations of its products and today
there remain but one or two, it becomes
clear that COKIN has achieved an extra-
ordinary feat.
imitations of its products and today
there remain but one or two, it becomes
clear that COKIN has achieved an extra-
ordinary feat.
Guaranteed worldwide
distribution
The
over 100 COKIN distributors
world-
wide provide a permanent dialogue
with image craftsmen, photographers or came-
ramen, no matter where they are on earth, to
satisfy and if possible anticipate their needs.
ramen, no matter where they are on earth, to
satisfy and if possible anticipate their needs.
•
The majority of COKIN distributors have been
doing so for many years and have a perfect
knowledge of the products. One could almost
say that, anywhere you go on this vast planet,
you will find your pre-
ferred filters.
knowledge of the products. One could almost
say that, anywhere you go on this vast planet,
you will find your pre-
ferred filters.
And when one is a
“pro”, this counts
for a lot!
FILTERS FOR
BLACK & WHITE
AND SEPIA PHOTOGRAPHY
COKIN
WATCHWORDS:
SERVICE & QUALITY
FILTERS FOR BLACK & WHITE PHOTOGRAPHY
SEPIA FILTERS
Sepia
005
Sepialight 045
FILTER 005
COKIN USERS
are numerous and prestigious,
and include...
NASA’s
Space Shuttle program: use
of special filters for their telescopes.
CINEMA,
Akira Kurosawa, director;
Fabrice Rousselot, head cameraman;
and many others have chosen COKIN
filters for their films.
and many others have chosen COKIN
filters for their films.
NO FILTER
FILTER 003
Sepia
tones are perfect for the creation of images from times past.
For suitable subjects (portraits, landscapes or
still lifes, for example) you can either photograph them directly – with colour film or digitally – with one or the
other of the two filters available, or re-shoot black and white images (on the copy stand, if needed) with the 005 filter – in
colour, obviously.
colour, obviously.
•
I
n both cases, using a filter is without a doubt the most rapid and efficient method for obtaining images in pleasant
sepia tones, rather than subjecting yourself to long and tedious work with film or digital.
> Photography Jean-François Alexandre
> Photography Wilson Castaneda