Nikon Camera F3AF - Manual (Page 103)

Anti-Cold Battery Pack DB-2
In cold weather, use the Anti-Cold Battery Pack DB-2, which
accepts two AA-type batteries, as an alternative power supply
to the batteries inside the camera body. Simply connect the
DB-2 to the camera body, then slip the assembly inside your
pocket or coat to keep it warm. This assures that the camera’s
metering system will function even in very cold temperatures.
Cable Release AR-3
The screw-type AR-3 makes for vibration-free shutter release.
Rubber Eyecup
Attached to the finder eyepiece® , this eyecup excludes strong
light and heips prevent eye fatigue.
Eyepiece Correction Lenses
These are accessory lenses that screw into the viewfinder eye­
piece to enable near- and farsighted photographers to take
pictures without having to wear eyeglasses. Nine models are
available, offering a choice of the following diopters: -5, -4, -3,
-2, 0, -1-0.5, -M, -1-2 and -f3; the diopters represent the
combined dioptry of the viewfinder and lens, and not the dioptry
of the eyepiece correction lens only.