Canon R Lenses Booklet Product booklet

Canon

INTERCHANGEABLE
LENSES R

PROPER HANDLING OF LENSES...

When changing lenses, avoid exposure to direct sunlight or strong artificial light. Do it in
the shade at all times.

© When the lens is detached from the camera, cover the lens base with o dust cover to keep
it free from dust.

‘© When mounting lenses, do not opply excessive force on the lens, but apply just enough to
fit the lens firmly.

‘lt is recommended that the operture charge lever be charged when mounting a Super
Canomatic lens.

'2Do not at any time touch the mirror in the camera. This is to avoid scratching or domoging
the mirror.

FOCUSING...

viewing through the viewfinder, turn the focusing ring so thot the horizontally-split
image aligns in the center of the finder portion of the ground glass. The distance scale
reading indicates the distance between the subject ond film plane in both meter and feet.
However, this reading is not essential unless you are taking pictures with flash or infrared film.

LENS APERTURE.

Lens aperture controls the light amount and depth-of-field. One F-stop difference on the linear
aperture scale normally represents double or one-half of the light amount. See the chart
below for reference.

F-Stop

2.8/3.5] 4/56) 8 | 11 | 16) 22 |
V2 W/3 | Wa | 1/8 (1/16 1/92 1/64/1/128)
[2x [ax | 4x | ex | 16x 32x) 64x /128x

Canomatic Lens R with Ser

tomatic Diaphragm System...

The lens aperture con be pre-set to a desired F-stop by turning the pre-set operture ring.
‘When the shutter is released, the lens aperture stops down to o pre-selected F-stop. It re-
‘opens when the charge ring is turned manually. The Canomatic system can be released man-
vally by pressing the pr

et release button.

Manual Lens Aperture with Pre-Set Aperture Ring...

‘The operture con be pre-set manually by turning the pre-set aperture ring. Then you close
down the lens operture to the prescribed F-stop for @ shot by turning the aperture set ring,
‘and open up for viewing by turning the aperture set ring manually.

Distonce Scale

Depth-of-Field Scale
Distonce Index Mark

Distance Scole
Distonce Index Mork

Infrared Index Mark

The letter “'R'* on the depth-of-field scale of all Canon lenses
is the index for infrared photography. When an infrared film
is used, proper focusing is done in the following manner. Focus
the subject in the normal way. Read off the distance. Turn
the focusing ring further to match the distonce reading to the
"R™ mark. Your lens is now focused for infrared photography. _ Infrared Index Mark “"R’*

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