Canon III-A User Manual
Page 18
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MAGNIFICATION
SELECTOR
Thcrtt
ar*
thr«*
positions
for
th*
Moanlficotlon
Saloctor;
F,
lx, and I.Sx. When really sharp foeyslng is required, turn the Selector to 1.5x when the ob
ject will be magnified 1.5 times. Remember however, the actual image recorded on the film
will be the picture seen at F position of the Selector.
The lx position corresponds to the image seen and recorded by any CANON LENS with a
focal length of 100 mm. The 1.5x position shows the image for any CANON LENS of focal
length of 135 mm.
A
certain difference between the picture seen through the Range-View Finder Eyepiece and
the
image
recorded
by
the
lens
is
inevitable.
For
normal
photography
the
difference
is
immaterial being so slight. But for certain''work compensation should be allowed.
The diagram shows the difference, or parallax, when the Selector is at F for a 50 mm lens.
FitIJ’of-View of tho
lens
(so mm).
FioU-of-Viow of tho
findor
S.S ft.
FI»ld-of-Viow of th»
findor
»1 12 ft.
Flold-of-Vi»w of tho
findor
at
Infinity.
15