Optional viewing aids, Dioptric adjustment lenses s – Canon A-1 User Manual
Page 87
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OPTIONAL VIEWING AIDS
Dioptric Adjustment Lenses S
The dioptric adjustment lens S is an acces
sory which slides into the grooves of the
viewfinder eyepiece from above to correct
individual
eyesight.
With
them,
eyeglass
wearers can photograph without glasses.
The A-1 ’s eyepiece has a standard dioptric
adjustment
of
-1
for
normal
eyesight.
The following 10 kinds of dioptric adjust
ment lenses are optional accessories: -i-3,
-1-2, -1-1.5, -tl, -tO.5, 0, -0.5, -2, -3 and -4
(diopters). The specified diopters of these
lenses are recorded as the real power when
attached to the camera, reflecting the -1
power of the camera’s viewfinder.
You could select the appropriate dioptric
lens by choosing the one closest to the num
ber of diopters in your glasses prescription.
But, we propose that you actually look
- 5 (