Canon EOS 20D - Manual (Page 60)

3 Setting the Processing ParametersN
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The same effect as using filters with black-and-white film can be
obtained with digital images. A color can be brightened by using a filter
having a similar or same color. At the same time, the complementary
colors will be darkened.
v
When color toning is set, color toning will be applied to the captured
black-and-white image before being recorded to the CF card. It can
make the image look more impressive.
The following can be selected:
[N:None] [S:Sepia] [B:Blue] [P:Purple]
[G:Green]
Filter effects
Filter Sample effects
N: None
Normal black-and-white image with
no filter effects.
Ye: Yellow
The blue sky will look more natural,
and the white clouds will look
clearer.
Or: Orange
The blue sky will look slightly
darker. The sunset will look more
brilliant.
R: Red
The blue sky will look quite dark.
Fall leaves will look crisper and
brighter.
G: Green
Skin tones and lips will look fine.
Tree leaves will look crisper and
brighter.
Toning Effect
Setting the [Contrast] to the plus side will make the filter effect more
pronounced.