Interchanging the Focusing Screen

Ec-series Interchangeable Focusing Screens

Ec-A: Standard microprism Compatible with all EF lenses. Lenses with a maximum aperture smaller than f/5.6 will cause the focusing screen’s microprism to darken.

Ec-B: New split screen

Compatible with all EF lenses. With slow lenses whose maximum aperture is smaller than f/5.6, the split-image circle may darken.

Ec-CII: All Laser-matte

EOS-1N’s standard focusing screen.

Ec-CIII: Laser-matte

EOS-1 V’s standard focusing screen. The CIII logo is imprinted on the lug to distinguish it from the Ec-N.

Ec-H: Laser-matte with scale Compatible with all EF lenses. The scales at the center and periphery help you compose shots for close-ups and photomicrography.

Ec-I: Laser-matte with cross hair reticle Use the cross hair at the center to focus.

Suited for photomicrography and astrophotography.

Ec-L: Cross split screen

Compatible with all EF lenses. Focus with the vertical and horizontal splits. Lenses with a maximum aperture smaller 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-D: Laser-matte with grid Compatible with all EF lenses. Ideal for architectural photography and photo duplication work.

Ec-R: New Laser-matte EOS-1N RS’s standard focusing screen.

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Canon EOS-1V HS manual 128