Canon EOS 1D Instructions Manual page 165

Ec-series Interchangeable Focusing Screens
Ec-A: Standard microprism
Lenses with a maxi-
mum aperture smaller
(higher f/number) than
f/5.6 will cause the
focusing screen's
microprism to darken.
Ec-B: New split screen
Lenses with a maxi-
mum aperture smaller
(higher f/number) than
f/5.6 will not cause the
focusing screen's
microprism to darken.
Ec-CII: All Laser-matte
EOS-1N's standard
focusing screen.
Ec-CIII: Laser-matte
EOS-1D and EOS-1V's
standard focusing
screen. The CIII logo is
imprinted on the lug to
distinguish it from the
Ec-N.
Ec-D: Laser-matte with grid
Ideal for architectural
photography and photo
duplication work.
Although the EOS-1D and EOS-1V use the
same focusing screen, the picture coverage is
smaller with the EOS-1D. The illustration
compares the picture coverage of both cameras.
Changing the Focusing Screen
Ec-H: Laser-matte with scale
The scales at the
center and periphery
help you compose
shots for close-ups and
photomicrography.
Ec-I: Laser-matte with cross hair
Use the cross hair at
the center to focus.
Suited for photomicrog-
raphy and astrophotog-
raphy.
Ec-L: Cross split screen
Focus with the vertical
and horizontal splits.
Lenses with a maxi-
mum aperture smaller
(higher f/number) than
f/5.6 will cause the
focusing screen's split
portion to darken.
Ec-N: New Laser-matte
EOS-3's standard
focusing screen.
Ec-R: New Laser-matte
EOS-1N RS's standard
focusing screen.
EOS-1D
10
EOS-1V
165