B+W 25.5 Digital PRO UV/IR (486) 19230 ユーザーズマニュアル
製品コード
19230
A special line of B+W filters
for the increasingly popular digital cameras
for the increasingly popular digital cameras
In digital photography, filters are also important tools
for enhancing picture quality. In spite of the effects
that can be applied with imaging control programs
that allow subsequent corrections not possible with
traditional photography, the basic rule is still valid:
Picture information that is not present in the original
photograph cannot be reconstructed later with a
computer – unless they are “painted in”, which is not
authentic. When UV- or IR radiation have caused a
haze and lack of sharpness, it would be only remedi-
ally possible to counter this deterioration by bending
the gradation curve (increasing contrast) and by arti-
ficial sharpness correction (unsharp masking). This
method cannot efficiently duplicate the brilliance and
detailed sharpness that a UV-/IR blocking filter in
front of the lens would have preserved. If reflections
on a pane of glass block the view of things behind it,
even the most sophisticated image manipulation
program cannot magically recreate information that’s
been lost, whereas a polarizing filter would have
eliminated most of the reflections. And enhancing
filters add specific enhancements that are unique and
not duplicated in post-production imaging control.
for enhancing picture quality. In spite of the effects
that can be applied with imaging control programs
that allow subsequent corrections not possible with
traditional photography, the basic rule is still valid:
Picture information that is not present in the original
photograph cannot be reconstructed later with a
computer – unless they are “painted in”, which is not
authentic. When UV- or IR radiation have caused a
haze and lack of sharpness, it would be only remedi-
ally possible to counter this deterioration by bending
the gradation curve (increasing contrast) and by arti-
ficial sharpness correction (unsharp masking). This
method cannot efficiently duplicate the brilliance and
detailed sharpness that a UV-/IR blocking filter in
front of the lens would have preserved. If reflections
on a pane of glass block the view of things behind it,
even the most sophisticated image manipulation
program cannot magically recreate information that’s
been lost, whereas a polarizing filter would have
eliminated most of the reflections. And enhancing
filters add specific enhancements that are unique and
not duplicated in post-production imaging control.
The mount sizes and the design of
DIGITAL-PRO
fil-
ters from B+W are tailored specifically to digital
cameras and camcorders. Their exterior chrome fin-
ish harmonizes perfectly with the trendy light colors
of digital cameras and their optical quality is tailored
to the high-resolution digital lenses.
cameras and camcorders. Their exterior chrome fin-
ish harmonizes perfectly with the trendy light colors
of digital cameras and their optical quality is tailored
to the high-resolution digital lenses.
B+W FOR FILM & DIGITAL
Correction- and creative filters with a great variety
of accessories for analog and digital photography
of accessories for analog and digital photography
Filters are indispensable for serious photography.
They can tailor the color temperature of the light to
the type of film to correct color casts; increase color
saturation and penetrate veils of haze; block sharp-
ness-reducing as well as color shifting ultraviolet and
infrared radiation; control the rendition of colors in
terms of shades of gray on black-and-white films;
reduce or increase contrast; eliminate or attenuate
unwanted reflections or even enhance them if
needed, and much more, as described on the pages
that follow.
They can tailor the color temperature of the light to
the type of film to correct color casts; increase color
saturation and penetrate veils of haze; block sharp-
ness-reducing as well as color shifting ultraviolet and
infrared radiation; control the rendition of colors in
terms of shades of gray on black-and-white films;
reduce or increase contrast; eliminate or attenuate
unwanted reflections or even enhance them if
needed, and much more, as described on the pages
that follow.
Dioptric lenses for close-up shots down to the
range of macro photography; a great variety of trick-
and special effects attachments; rigid and folding lens
hoods; protective covers, adapter rings, special
mounts for individual applications, filter cases and
micro-fiber cleaning cloths complement the line of
B+W filters.
and special effects attachments; rigid and folding lens
hoods; protective covers, adapter rings, special
mounts for individual applications, filter cases and
micro-fiber cleaning cloths complement the line of
B+W filters.
The range of applications of B+W filters and ac-
cessories includes all analog and digital photography:
rangefinder- and single lens reflex cameras, digital
cameras; camcorders, and broadcast video; and cin-
ematography.
rangefinder- and single lens reflex cameras, digital
cameras; camcorders, and broadcast video; and cin-
ematography.
B+W uses the very best glass and filter mounts,
and machines them with CNC-controlled fabrication
machines to make sure that filters, supplementary
lenses, and special effects attachments perform their
functions optimally without jeopardizing the image
quality. This provides the tightest possible tolerances
with stringent quality control at every stage of pro-
duction.
machines to make sure that filters, supplementary
lenses, and special effects attachments perform their
functions optimally without jeopardizing the image
quality. This provides the tightest possible tolerances
with stringent quality control at every stage of pro-
duction.
B+W is especially proud of its modern coating
technology: The MRC (Multi Resistant Coating)
MRC
technology that we’ve developed exclusively is not
only an enhanced process that assures virtually com-
plete elimination of surface reflections on both sides
of each filter and thus leads to a maximization of
light transmission. In addition, its extraordinary hard-
ness minimizes scratching and its water- and dirt re-
pelling surfaces facilitate the care of filters.
only an enhanced process that assures virtually com-
plete elimination of surface reflections on both sides
of each filter and thus leads to a maximization of
light transmission. In addition, its extraordinary hard-
ness minimizes scratching and its water- and dirt re-
pelling surfaces facilitate the care of filters.
Many effects that can be
achieved during the original exposure
cannot be achieved by subsequent digital imaging manipulation
achieved during the original exposure
cannot be achieved by subsequent digital imaging manipulation
Check to see if the digital
camera that you are
considering has a filter thread.
If so, you will later be able
to use high-grade filters
to make corrections and
to add creative effects.
camera that you are
considering has a filter thread.
If so, you will later be able
to use high-grade filters
to make corrections and
to add creative effects.