Minolta XG-A - Infrared Index for Focusing

FOCUSING
The focusing screen of your XG-A features a
split -image spot surrounded by a band of
microprisms in the center of an Acute Matte
field . .
To focus the camera visually with usual
lenses , look through the viewfinder and turn
the focusing collar on the lens until the upper
and lower subject images in the spot are exactly
al igned with no broken lines between them
and/or the subject image in the band does not
shimmer or appear broken up . At this point,
the subject image within the focusing aid
should appear clearest and seem
to blend with
that on the matte field arou nd it.
Though the most satisfactory focusing aid
and
method depend upon the conditions and
personal preference
of the photographer, the
above method may provide the best results with
medium wideangle to short telephoto lenses.
Generally speaking, however, you will pro-
bably find that using the split-image spot will
provide the easiest way to focus with subjects
having
vertical lines; the microprism band for
lenses from medium wideangle through medium
telephoto, especially with subjects not having
vertical lines; and the matte field for longer
lenses
or macro or other work involving con-
siderable lens extension .
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