Dioptric adjustment lenses – Canon AE-1 User Manual
Page 51
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Dioptric Adjustment Lenses
Dioptric
adjustment
lenses
can
be
attached by inserting them from above into
the grooves in the viewfinder eyepiece to
compensate for the individual eyesight. With
them, near-sighted or far-sighted persons can
perform photography without glasses.
The built-in eyepiece lens of the AE-1 has
—1
diopter.
The
following
10
kinds
of
dioptric adjustment lenses are optional ac
cessories: •^3, -t2, -H.5, -H, -t-0.5, 0, -0.5,
—2, —3 and —4 (diopters).
One way of selecting the correct dioptric
adjustment lens for you is to select the one
that is the closest to your glasses in regard to
number of diopters. But, we propose that,
when you select the most appropriate dioptric
adjustment lens, you actually look into the
viewfinder through it after placing it over the
eyepiece.
Because the camera itself has —1 diopter,
the diopters of the lenses are recorded as the
real power when attached to the camera, thus
reflecting
the
power
of
the
camera's
viewfinder.