Nikon Nikomat (Nikkormat) FS Manual page 24

LENS HOOD
The use of a lens hood
is recommended at all
times, especially when
the lens is turned to -
ward the light, or where
there is stray light
present _
Two types of lens hood
are available for Nikkor
lenses : snap -on and
screw-in _
24
Snap-on Lens Hood
Snap -on hoods combine " slip -on " speed and" screw-in " security.
By depressing the buttons (one located on either side of the hood). the
hood is attached or detached. The hood will also fit directly over a
screw -in filter , permitting use of both units with the lens at one time .
The hood can also be " stored" in reverse position on the lens .
Screw-in Lens Hood
Screw -in hoods can be used with screw -in
fil~ers
or Series filters.
However, screw -in filters are recommended, because the hood in
combination with Series filters may not always give satisfactory
results with wideangle lenses , owing to possible vignetting .