Lens Hoods; Dioptric Adjustment Lenses S - Canon AE-1 PROGRAM Instructions Manual

29. Other Accessories
Lens Hood
We strongly recommend the use of a lens hood
to keep out side light which may cause flare and
ghost images to form on the image. Rigid Canon
hoods also help to protect the lens from shock.
Use only a hood whi ch is specified for your par-
ticular lens. Most Canon hoods fit into the
bayonet mount and are fi xed by turning . For more
details, please see the lens' instructions.
77
Dioptric Adjustment Lenses S
Ten eyesight correction lenses are available in
the powers of +3, +2, + 1.5 + 1, +0.5 , 0, -0.5 ,
-2, -3
and
-4
diopters. They may make view-
ing and focusing easier if you are near- or far-
sighted. Choose the one which is closest to
your eyeglass prescription, and make a practical
test if possible.