Nikon F3 - Manual (Page 51)

Interchangeable viewfinders
In addition to the DE-2 Eye-Level Finder, the F3 accepts
various other interchangeable viewfinders. To remove
the finder, slide the finder release levers @ with your
thumb and finger towards the back of the camera (Fig. 1),
and lift the finder out (Fig. 2). The DW-3 Waist-Level
Finder is ideal when you want to use the camera at a low
angle or upside down over your head for shooting over
crowds. The DA-2 Action Finder works well for those
situations when you can't bring your eye close to the
finder, such as when you are wearing a helmet or goggles
or when the camera is enclosed in a waterproof under­
water housing. The DW-4 6X Magnification Finder is for
critical high-magnification close-up work or photomicro­
graphy. Regardless of which finder is attached, you still
have full automatic exposure control because the meter is
built not into the finder but the body.
When using the DA-2 or DW-3, be careful that stray light
does not enter from the top and cause an inflated meter
reading.