Contax 139 Quartz - Infrared Photography

Infrared Photography
Infrared film may be used in the Contax 139 for special
applications such
as night photography. As infrared
light waves
are longer than waves of the visible light
spectrum, ho we ver, the lens will fo cus at a slightly
different point with infrared film, even though the sub-
ject w ill appear to
be in focus inside the viewf inder. To
compensate for this, al l Ze i ss le ns es, except for the
Mi
rot ar l enses , are provid ed w ith an inf rared corr ec ti on
mark
(a l so ca ll ed "R ind ex ") .
First. focus in the normal manner, th en r ea lign the di s-
tan ce r ead ing w hi ch is indexed on the focusing ring to
the "R ind ex" mark . In the photos, correc ti on h as been
made at i nf ini ty by rea ligning th e i nf ini ty mark (00) to
the R index .
• A lways
use a r ed filt er for infr ared photography.
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