B&W 65-030216 Datasheet download pdf (Page 5)

Particularly in digital photography, B+W

ﬁ lters are important tools for improving

image quality. A B+W polarizing ﬁ lter,

for example, provides more saturated col-

ors and higher color contrasts because the

bluish-gray haze typical of sunny days is

ﬁ ltered before the image sensor gener-

ates the data record. If UV or IR radiation

causes haze or blur a UV/IR blocking ﬁ lter

in front of the lens can ensure more

brilliance and detail sharpness without the

necessity for coarsening resharpening in

the image program. Filters solve problems

before they occur in the image sensor.

Image-processing programs, on the other

hand, cannot conjure up information

which is not contained in the data record.

Many of the most commonly used color

and contrast corrections work by remov-

ing image information (destructive image

correction). Such, in some cases coarse

repairs leave considerable gaps in the

data record which are not yet recogniz-

able on the PC monitor, but can become

visible on the higher-resolution print.

A key criterion for an outstanding ﬁ lter is

the coating. Quality begins in front of the

lens, and that is, of course, where the

ﬁ lter is placed. A ﬁ lter must not impair the

performance of the optics. MRC (Multi

Resistant Coating) have a multicoating

layer on both sides (7 + 1 on each) which

ensures maximum reﬂ ection reduction

and thereby eliminates disruptive stray

light. In this way, more brilliant colors and

higher contrasts can be attained. Due to

the low residual reﬂ ection (0.5%) MRC re-

liably prevents ghost or multiple images

which can be caused by back reﬂ ection

from the image sensor.

Furthermore, MRC protects the ﬁ lter from

scratching with increased layer hardness,

thereby preserving the high optical quali-

ty. In addition, MRC is dirt and water

repellent, which makes cleaning easier.

NEW: The MRC nano coating – all XS-Pro

Digital ﬁ lters have it. The outer layer of

MRC nano has been strengthened in its

effectiveness. The nanotechnology-based

characteristic (lotus effect) produces a

bet ter beading effect in water. This makes

cleaning the ﬁ lter surface even simpler

and faster.

B+W ﬁ lters for better quality

in digital photos

Top performance thanks to

Multi Resistant Coating (MRC)

B+W is the ﬁ rst ﬁ lter manufacturer in

the world to offer MRC (Multi Resistant

Coating). This multi-layer coating is vapor-

deposited in highly advanced vacuum

coating plants. It is extremely low-reﬂ ec-

tive and highly resistant to scratching. But

above all its unique dirt and water-repel-

lent surface makes cleaning the ﬁ lters

easier. In this way, ﬁ lters can also perform

a protective function for the front lens.

Safety through

high-tech production

Reﬂ ection ρ (%) for 2 surfaces while n = 1.52

300 nm

0

2

4

6

8

10

600 nm400 nm

uncoated

single-coated

MRC-ﬁ nished

700 nm500 nm

λ

5

1 2 3 4 5 6 7 8 9 10 ... 35 36

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