Datasheet

PREMIUM
Mount Types:
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Line
B+W 007 Clear XS-Pro Digital
Thickness comparison:
left: standard mount F-Pro
right: XS-Pro Digital
Filter mounts –
the mechanical specialists
Premium Line
The important role played by the fi lter
mount and its mechanically complex
task are often underestimated. Although
mounts are supposed to fi x the high-quali-
ty fi lter glass in position “for life”, they
must not cause any sharpness-reducing
tension in the glass. B+W manufactures
various mount types, mainly out of stable
brass, on CNC machines. The fi lter glass
is screwed into a high-precision retaining
ring, applying a pre-specifi ed torque. Be-
sides the excellent F-Pro standard mount
which is suitable for telephoto lenses up
to the most common wide-angle focal
lengths, B+W offers the very fl at XS-Pro
mount for super-wide-angle lenses. This
eliminates vignetting. For even more ex-
treme focal lengths there is the Oversized
mount on which the fi lter glass protrudes
far beyond the thread of the retaining
ring (more under “Filter mounts”). It is
the high-grade mounts that fi nally make
a B+W fi lter a true piece of high-tech that
you can rely on for many years to come.
The increasingly short focal lengths of
zoom lenses for digital system cameras in-
crease their proneness to vignetting when
attachments such as fi lters are used.
For
this reason, B+W has developed the new
Premium Line series with an extremely
narrow fi lter mount: XS-Pro Digital. It is
ideal for demanding DSLR photography
with short wide-angle zooms, beginning
at 12 mm (APS format). Despite its small
construction depth, this mount is fully
equipped with a front thread for further
accessories such as lens hoods or snap-
in lens caps. This fi lter series is also made
of brass and comes in matte black to
prevent refl ections.
Three fi lter types are available: 007 Clear
MRC nano, UV 010 MRC nano and the
XS-Pro Digital polarizing fi lter. The last is
supplied exclusively as a Käsemann-type
circular MRC nano polarizing fi lter.
The Premium Line XS-Pro Digital fi lters
are available in Ø 49, 52, 55, 58, 60, 62,
67, 72, 77 and 82.
Premium
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