Dioptric Adjustment Lenses - Canon AT-1 Instructions Manual

Dioptric Adjustment Lens S
Dioptric adjustment lenses can be
attached by inserting them from above into
the grooves in the viewfinder eyepiece t o
compensate for the individual eyesight. With
-
them, near-sighted or far-sighted persons can
perform photography without glasses.
w
The built-in eyepiece lens of the AT-1 has
-1
diopter. The following
10
kinds of
dioptric adjustment lenses are optional acces-
sories:
+3, +2,
+1.5, +1, +0.5, 0, -0.5,
-2,
-3 and -4 (diopters).
One way of selecting the correct dioptric
adjustment lens for you is t o select the one
that is the closest t o your glasses in regard t o
number of diopters. But, we propose that,
t o select the most appropriate dioptric ad-
justment lens, you actually look through
the viewfinder after placing it over the eye-
piece.
Because the camera itself has -1 diopter,
the diopters of the lenses are recorded as the
real power when attached t o the camera, thus
reflecting the power of the camera's viewfin-
der.