Mamiya 645 PRO TL - Manual (Page 31)

Infrared Photography Using
Infrared light rays-being of longer
wavelength - focus at a slightly dif-
ferent plane and require the follow-
ing adjustment:
1. Note the Red Index Mark against
which you read your distance scale.
The red infrared index mark is slightly
to its right.
2. After focusing in the usual manner,
read the distance scale and move it
to the right to line up with the infrared
index mark.
56 8 56 8 11 11
The 300mm and 500mm APO lenses
for Mamiya 645 cameras, being also
corrected for infrared light rays, do
not need an index mark for infrared.
For proper filter and exposure
information be sure to consult the
instructions enclosed with infra-
red film.
The Mamiya 645 PRO TL Tripod
Socket accepts a standard 1/4” tripod
mounting screw. For use with tripods
having 3/8” mounting screws, first
unscrew the small black philips head
retaining screw in the center of the
tripod socket. Then remove the 1/4"
bushing with a thin coin. To re-install
the 1/4 bushing, reverse the proc-
ess.