Nikon EL2 - Manual (Page 31)

Focusing is done at full aperture with Nikkor lenses fit­
ted with an automatic diaphragm. This technique pro­
vides the brightest possible images on the focusing
screen for easy focusing and composing. It also mini­
mizes depth of field so that the image snaps in and out
of focus distinctly.
The Nikon Type K screen comes with the camera as
standard equipment. To focus, turn the focusing ring
on the lens until the two halves of the rangefinder
image coincide to form a single, crisp image; when using
the microprism ring, turn until the microprism pattern
shifts to a sharp and crisp image. You can also focus on
the matte field that surrounds the rangefinder/micro-
prism central area.
The lens can also be prefocused using the distance scale
engraved in both meters and feet on the lens barrel.
Simply turn the focusing ring until the desired camera-
to-subject distance (as measured or estimated) is lined
up with the distance scale index on the lens barrel. This
technique is useful for candid shots of elusive subjects
when time does not permit through-the-lens focusing.