Accessories-Lens Hoods
 The use
of a lens hood is recommended at all times to prevent extraneous light from striking
the lens surface and causing flare or ghost, and as an added measure of protection
against damage to the lens. Nikon lens hoods come in four types depending on the
lens: Screw-In, Snap-On, Slip-On and Builtln. They are calculated precisely for each
focal-length Nikkor lens to provide maximum protection against stray light.
To attach or remove the snap-on lens hood, simply depress the buttons on either side
of the hood. It will also fit directly over a screw-in filter, so both can be used
on a lens at the same time. When not in use, the snapon hood can be reversed for
storage on the lens, and the lens and its hood can be stored together in the eveready
case.
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Accessories-Filters
Nikon filters are made of optical glass, ground and polished so that both surfaces
are optically flat and parallel.
Nikkor lenses and Nikon filters are made for each other. For best results, use Nikon
filters on Nikkor lenses. Nikon filters are available in both screw-in and series
mounts, depending on the type of lens.
Since filters cut down on the light passing through the lens, some increase in exposure
time or in lens opening is necessary to compensate for the loss of light. This increase
is expressed as a filter factor. For example, if the filter factor is 2, double the
exposure time or open up the lens one full stop. Filter factors depend on the light
source and type of film. The chart at right shows the filter factors.
No exposure compensation is necessary with the Photomic FTN finder. The built-in
meter reads only the light passing through the lens and therefore compensates automatically
for loss of light.
| |
Type
|
Designation
|
Esposure factor
|
|
Daylight
|
Tungsten light
|
| Black-and-white film |
Yellow
|
|
|
|
|
|
Orange
|
O56
|
3.5
|
2
|
|
Red
|
R60
|
6
|
5
|
|
Green
|
|
|
|
|
| Black-and-white and color films |
Ultraviolet
|
|
1
|
|
Polarizing
|
Polar
|
2.4
|
|
Neutral Density
|
| ND 4X |
| ND 8X |
| ND 100X |
| ND 400X |
|
|
| Color film |
Skylight
|
L1A
|
1
|
|
Amber
|
|
|
|
|
Amber
|
|
|
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Note: If you wish to leave a filter on the lens to protect it against accidental
damage, the use of the L37 filter is recommended.
If the lens is pointed toward the sun or toward a very bright light at ni2rkt, it
is best to remove any filter, including the L37, since light reflected from the filter
surface may form ghost images on the film.
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Accessories-Finder Eyecup
The finder eyecup screws directly onto the finder eyepiece to prevent extraneous
light from entering the viewfinder.
Accessories-Eyepiece Correction Lenses
 Eyepiece
correction lenses are designed to permit near-sighted or far-sighted users to view
and focus without their glasses. They screw directly into the rear of the viewfinder.
Available in nine diopters, -2,-3, - 4,-5, O, +0.5, +1, +2 and +3, each representing
the combined dioptry of the lens and the -1 diopter of the finder.
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